Need help please.... Doing gear swap

90'5.0 Conv · 04-27-2002, 04:42 PM

I'm about halfway through my gear swap. I'm replacing the 2.73's for 4.10's and was wondering if anyone had it work out with the original shims staying in the same spot? I bought my gears from Ford Racing. Does the larger ring gear get compensated enough by the smaller pinion to make it work out. If anyone knows, I'd appreciate the help.

Thanks, James

OUTPLAYN · 04-27-2002, 04:51 PM

You know I was going to ask the same question...A friend of mine works on stangs alot and told me that the stock shims will work to!!! So I would have to believe him...He does know his sh*t.

OK..next small question what is the # of splines on the stock axles and is it better to switch to a larger # of splines? For dragracing..

90'5.0 Conv · 04-27-2002, 04:58 PM

There's 28 splines on a stock axle I believe and yes if you're going to do some serious racing, you would want to move up to 31 for more strength. More splines the stronger.

James

fubar89lx · 04-27-2002, 05:02 PM

you can use the same shims,unless you had a gear whine and want to get rid of it. In that case you would have to measure the housing and get all new bearings and set preload,pinion depth,etc....Hope this helps.

fubar89lx · 04-27-2002, 05:03 PM

Oh yeah,one more thing,I've rebuilt over 50 rear ends.

OUTPLAYN · 04-27-2002, 05:14 PM

The kit that I have has new bearings in it. If I change those, I will have to check the clearence's???

90 50convt...have ya taken the car to the track yet?

90'5.0 Conv · 04-27-2002, 05:24 PM

Thanks for the reply fubar. Just out of curiosity, does that apply to all gears and gear distributors or just Ford Racing gears. I thought I heard that richmond gears were different. Not for sure though. Also, is there any small bits of advice before I put this thing in. The only thing I see being a pain is the pinion nut torque.

Thanks Again, James

fubar89lx · 04-27-2002, 06:11 PM

I'm not sure about Richmond gears. I would recomend cleaning the housing very well and replace the carrier bearings also. As for the turning torque on the pinion nut, I have a Snap-on turning torque wrench. I'm not sure about the spec right now. I can check when I go to work on Monday.The torque wrench ran about $350 bones.Good luck

fubar89lx · 04-27-2002, 06:14 PM

Hey outplayn, You will have to check the turning torque on the pinion nut and the ring gear backlash. It only took me about 2 hours to put mine in.

90'5.0 Conv · 04-27-2002, 11:47 PM

Outplayin-
Yeah, I've been to the track, thats why I feel like I need to do a gear swap.LOL. I'm running 10.20s in the 1/8th with a basically stock heavy AOD convertible so I hope to see some good improvement. 10.20's convert to about a 15.90 in the 1/4.

Fubar-
Thanks again for the help. I believe the torque is like 140 ft lbs on the pinion nut till theres no play. Then like 25 inch pounds to load the bearing. Does that sound about right?

Later, James

sn95gt19 · 04-28-2002, 01:59 AM

I ATTEMPTED a gear swap in my 95 and could not get the crush sleave to crush, so i ended up paying someone $200 just to crush the damn sleave and basically bolt up the carrier, i had a ford gear that didnt whine or anything so he reused all the stock shims, i think fords are the only ones that you can reuse the stock shims. and yes it is supposed to take 25 INCH POUNDS to turn the pinion gear(without the carrier installed, spinning just the pinion)

fordgasm · 04-28-2002, 07:18 AM

If you are using the Ford gears usually you can reuse the same shims. But you must check the back lash and gear pattern to be sure. Ford makes their gear sets accurately allowing easy assembly at the plant, that's why we can reuse exisiting shims in most cases. Be sure to properly tighten the crush collar and check everything twice.

If using other than the Ford gears you will neet to go through a complete gear set up.

90'5.0 Conv · 04-28-2002, 10:23 AM

SN95-
What all did you attempt to crush the sleeve? Did you have air tools? Did you have a problem with the pinon spinning? What did you try?

Fordgasm-
I still did intend to check backlash and wear patterns after installation. I wanted to make sure that the stock shims worked out before with someone else. Thanks for all the help.

Thanks for the help everyone! I can't wait to get done. Should be done this week some time and I'll take it to the tracjk Friday and let everyone know what kind of improvements I see especially in the 60 ft time.

Later James

sn95gt19 · 04-28-2002, 11:35 AM

i had the impact on it for about a half hour, tried using a 2' piece of pipe for leaverage, my biggest prob was keeping the pinion from spinning. i slid a pipe wrench in there with two bolts from the driveshaft and ended up bending the pipe wrench in half, the guy i ended up paying to do my gear said that SOMETIMES it takes up to 600 ft. lbs to crush the sleave.

90'5.0 Conv · 04-28-2002, 01:09 PM

Wow, hope not. Did he tell you how he ended up getting it? Did you have the axles in when you torqued the pinion nut?

James

sn95gt19 · 04-28-2002, 02:29 PM

it was pretty hard for me cause i was layingon the ground with my car jacked up about a foot and a half, i guess he just used the right tool that keeps the pinion from turning and used a 4 foot breaker bar. i didnt have the axles in when i was trying to crush it

fubar89lx · 04-28-2002, 03:51 PM

you don't want the axles in when you torque the pinion nut. It took me about a minute to crush my sleeve. I'm a techinician and have access to my own air tools and lift though.good luck!

sn95gt19 · 04-28-2002, 04:56 PM

THATS THE ONE THING THAT I NEEDED WHEN TRYING MY GEAR SWAP A LIFT!!!!!!!!!!!!!!!!!!!!!!
IM SURE IT WOULD HAVE WENT A LOT SMOOTHER

90'5.0 Conv · 04-28-2002, 05:01 PM

Well, I'll let you know how it goes when I get there. My car is jacked up about 3 Ft in the air so maybe that'll help. Thanks fellas.

James

sn95gt19 · 04-28-2002, 05:07 PM

make sure you have a 3ft pole handy for some leverage, and good luck, let us know how it goes

04-27-2002, 04:42 PM	#1
90'5.0 Conv Long time member in and out Join Date: Jul 2001 Location: Albany, Ga Posts: 343	Need help please.... Doing gear swap I'm about halfway through my gear swap. I'm replacing the 2.73's for 4.10's and was wondering if anyone had it work out with the original shims staying in the same spot? I bought my gears from Ford Racing. Does the larger ring gear get compensated enough by the smaller pinion to make it work out. If anyone knows, I'd appreciate the help. Thanks, James __________________ 90' Mustang GT Convertible- C4 w/ manual body 4.10's soon to be 3.27's 2 Ch Flowmasters 1/8th ET 9.04

04-27-2002, 04:58 PM	#3
90'5.0 Conv Long time member in and out Join Date: Jul 2001 Location: Albany, Ga Posts: 343	There's 28 splines on a stock axle I believe and yes if you're going to do some serious racing, you would want to move up to 31 for more strength. More splines the stronger. James __________________ 90' Mustang GT Convertible- C4 w/ manual body 4.10's soon to be 3.27's 2 Ch Flowmasters 1/8th ET 9.04

04-27-2002, 05:02 PM	#4
fubar89lx Registered Member Join Date: Apr 2002 Location: Palm Bay,FL Posts: 24	you can use the same shims,unless you had a gear whine and want to get rid of it. In that case you would have to measure the housing and get all new bearings and set preload,pinion depth,etc....Hope this helps. __________________ Best E/T-13.2 Best MPH-108 Mods-Full exhaust,U/D pulleys,73mm mass air,70 mm M/A,Cobra intake,Crane 1.7 R/R,E303 Cam,3.55 gear,125HP Nitrous Works.

04-27-2002, 05:03 PM	#5
fubar89lx Registered Member Join Date: Apr 2002 Location: Palm Bay,FL Posts: 24	Oh yeah,one more thing,I've rebuilt over 50 rear ends. __________________ Best E/T-13.2 Best MPH-108 Mods-Full exhaust,U/D pulleys,73mm mass air,70 mm M/A,Cobra intake,Crane 1.7 R/R,E303 Cam,3.55 gear,125HP Nitrous Works.

04-27-2002, 05:24 PM	#7
90'5.0 Conv Long time member in and out Join Date: Jul 2001 Location: Albany, Ga Posts: 343	Thanks for the reply fubar. Just out of curiosity, does that apply to all gears and gear distributors or just Ford Racing gears. I thought I heard that richmond gears were different. Not for sure though. Also, is there any small bits of advice before I put this thing in. The only thing I see being a pain is the pinion nut torque. Thanks Again, James __________________ 90' Mustang GT Convertible- C4 w/ manual body 4.10's soon to be 3.27's 2 Ch Flowmasters 1/8th ET 9.04

04-27-2002, 04:51 PM	#2
OUTPLAYN Registered Member Join Date: Aug 2001 Location: Genoa,IL Posts: 79	You know I was going to ask the same question...A friend of mine works on stangs alot and told me that the stock shims will work to!!! So I would have to believe him...He does know his sh*t. OK..next small question what is the # of splines on the stock axles and is it better to switch to a larger # of splines? For dragracing..

04-27-2002, 05:14 PM	#6
OUTPLAYN Registered Member Join Date: Aug 2001 Location: Genoa,IL Posts: 79	The kit that I have has new bearings in it. If I change those, I will have to check the clearence's??? 90 50convt...have ya taken the car to the track yet?

04-27-2002, 06:11 PM	#8
fubar89lx Registered Member Join Date: Apr 2002 Location: Palm Bay,FL Posts: 24	I'm not sure about Richmond gears. I would recomend cleaning the housing very well and replace the carrier bearings also. As for the turning torque on the pinion nut, I have a Snap-on turning torque wrench. I'm not sure about the spec right now. I can check when I go to work on Monday.The torque wrench ran about $350 bones.Good luck __________________ Best E/T-13.2 Best MPH-108 Mods-Full exhaust,U/D pulleys,73mm mass air,70 mm M/A,Cobra intake,Crane 1.7 R/R,E303 Cam,3.55 gear,125HP Nitrous Works.

04-27-2002, 06:14 PM	#9
fubar89lx Registered Member Join Date: Apr 2002 Location: Palm Bay,FL Posts: 24	Hey outplayn, You will have to check the turning torque on the pinion nut and the ring gear backlash. It only took me about 2 hours to put mine in. __________________ Best E/T-13.2 Best MPH-108 Mods-Full exhaust,U/D pulleys,73mm mass air,70 mm M/A,Cobra intake,Crane 1.7 R/R,E303 Cam,3.55 gear,125HP Nitrous Works.

04-27-2002, 11:47 PM	#10
90'5.0 Conv Long time member in and out Join Date: Jul 2001 Location: Albany, Ga Posts: 343	Outplayin- Yeah, I've been to the track, thats why I feel like I need to do a gear swap.LOL. I'm running 10.20s in the 1/8th with a basically stock heavy AOD convertible so I hope to see some good improvement. 10.20's convert to about a 15.90 in the 1/4. Fubar- Thanks again for the help. I believe the torque is like 140 ft lbs on the pinion nut till theres no play. Then like 25 inch pounds to load the bearing. Does that sound about right? Later, James __________________ 90' Mustang GT Convertible- C4 w/ manual body 4.10's soon to be 3.27's 2 Ch Flowmasters 1/8th ET 9.04

04-28-2002, 01:59 AM	#11
sn95gt19 motors done......woohooo Join Date: Mar 2002 Posts: 799	I ATTEMPTED a gear swap in my 95 and could not get the crush sleave to crush, so i ended up paying someone $200 just to crush the damn sleave and basically bolt up the carrier, i had a ford gear that didnt whine or anything so he reused all the stock shims, i think fords are the only ones that you can reuse the stock shims. and yes it is supposed to take 25 INCH POUNDS to turn the pinion gear(without the carrier installed, spinning just the pinion) __________________ 95gt lazer red (98 cobra clone) Rice Haters Club Member #116

04-28-2002, 07:18 AM	#12
fordgasm Registered Member Join Date: Jan 1999 Location: Clayton, North Carolina, USA Posts: 803	If you are using the Ford gears usually you can reuse the same shims. But you must check the back lash and gear pattern to be sure. Ford makes their gear sets accurately allowing easy assembly at the plant, that's why we can reuse exisiting shims in most cases. Be sure to properly tighten the crush collar and check everything twice. If using other than the Ford gears you will neet to go through a complete gear set up. __________________ fordgasm CLICK HERE to see my 87 GT

04-28-2002, 10:23 AM	#13
90'5.0 Conv Long time member in and out Join Date: Jul 2001 Location: Albany, Ga Posts: 343	SN95- What all did you attempt to crush the sleeve? Did you have air tools? Did you have a problem with the pinon spinning? What did you try? Fordgasm- I still did intend to check backlash and wear patterns after installation. I wanted to make sure that the stock shims worked out before with someone else. Thanks for all the help. Thanks for the help everyone! I can't wait to get done. Should be done this week some time and I'll take it to the tracjk Friday and let everyone know what kind of improvements I see especially in the 60 ft time. Later James __________________ 90' Mustang GT Convertible- C4 w/ manual body 4.10's soon to be 3.27's 2 Ch Flowmasters 1/8th ET 9.04

04-28-2002, 11:35 AM	#14
sn95gt19 motors done......woohooo Join Date: Mar 2002 Posts: 799	i had the impact on it for about a half hour, tried using a 2' piece of pipe for leaverage, my biggest prob was keeping the pinion from spinning. i slid a pipe wrench in there with two bolts from the driveshaft and ended up bending the pipe wrench in half, the guy i ended up paying to do my gear said that SOMETIMES it takes up to 600 ft. lbs to crush the sleave. __________________ 95gt lazer red (98 cobra clone) Rice Haters Club Member #116

04-28-2002, 01:09 PM	#15
90'5.0 Conv Long time member in and out Join Date: Jul 2001 Location: Albany, Ga Posts: 343	Wow, hope not. Did he tell you how he ended up getting it? Did you have the axles in when you torqued the pinion nut? James __________________ 90' Mustang GT Convertible- C4 w/ manual body 4.10's soon to be 3.27's 2 Ch Flowmasters 1/8th ET 9.04

04-28-2002, 02:29 PM	#16
sn95gt19 motors done......woohooo Join Date: Mar 2002 Posts: 799	it was pretty hard for me cause i was layingon the ground with my car jacked up about a foot and a half, i guess he just used the right tool that keeps the pinion from turning and used a 4 foot breaker bar. i didnt have the axles in when i was trying to crush it __________________ 95gt lazer red (98 cobra clone) Rice Haters Club Member #116

04-28-2002, 03:51 PM	#17
fubar89lx Registered Member Join Date: Apr 2002 Location: Palm Bay,FL Posts: 24	you don't want the axles in when you torque the pinion nut. It took me about a minute to crush my sleeve. I'm a techinician and have access to my own air tools and lift though.good luck! __________________ Best E/T-13.2 Best MPH-108 Mods-Full exhaust,U/D pulleys,73mm mass air,70 mm M/A,Cobra intake,Crane 1.7 R/R,E303 Cam,3.55 gear,125HP Nitrous Works.

04-28-2002, 04:56 PM	#18
sn95gt19 motors done......woohooo Join Date: Mar 2002 Posts: 799	THATS THE ONE THING THAT I NEEDED WHEN TRYING MY GEAR SWAP A LIFT!!!!!!!!!!!!!!!!!!!!!! IM SURE IT WOULD HAVE WENT A LOT SMOOTHER __________________ 95gt lazer red (98 cobra clone) Rice Haters Club Member #116

04-28-2002, 05:01 PM	#19
90'5.0 Conv Long time member in and out Join Date: Jul 2001 Location: Albany, Ga Posts: 343	Well, I'll let you know how it goes when I get there. My car is jacked up about 3 Ft in the air so maybe that'll help. Thanks fellas. James __________________ 90' Mustang GT Convertible- C4 w/ manual body 4.10's soon to be 3.27's 2 Ch Flowmasters 1/8th ET 9.04

04-28-2002, 05:07 PM	#20
sn95gt19 motors done......woohooo Join Date: Mar 2002 Posts: 799	make sure you have a 3ft pole handy for some leverage, and good luck, let us know how it goes __________________ 95gt lazer red (98 cobra clone) Rice Haters Club Member #116

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