gear oil?

scale · 09-09-2002, 12:20 PM

I had my gears swapped to 373s about 2 years ago. I put about 500 miles on right away but now it has been sitting since then. I want to change my gear oil as well as all my other fluids before taking it out.

What type of gear oil should i put in my rear end? I have heard that ford uses a special kind that you have to get from the dealer. I dont wanna use the wrong thing.

Also, are there any tricks to filling it? How much oil should it take? I dont wanna over or under fill it. Usually you just fill up until it comes out the fill hole

Also does anyone have any tricks for filling up? I dont have a professional pump and it is impossible with a funnel since the hole is in a tight spot and also on the side of the housing.

Thanks

95mustanggt · 09-09-2002, 12:27 PM

When Lone Star Performance (Dallas TX) did my 3.73's they used Redline Synthetic Gear oil (80 or 90 weight I believe). I'm not aware of any special lubricant required.

Coupe50h · 09-09-2002, 12:32 PM

yea man, you can squeeze that oil in usually, but last time i spilled more than i got in, now i have an 8$ pump/syphon, that makes it a whole lot easier....... as far as type of oil, use differential gear oil, read the back and make sure it is for limited slip, you have to add an additive called 'friction modifier' the dealer gear oil already has this mixed if im not mistaken, i just added a tube of it to my 80w90 coastal oil, everything is fine so far, some people use synthetic but i see no point in it.

andy669 · 09-09-2002, 01:56 PM

I like the synthetic gear oil. You dont need the friction modifier additive with it either.

Andy

scale · 09-09-2002, 02:51 PM

ya i was thinking of getting a crappy little siphon hose like they sell at any walmart (has a little bulb for a pump) but i wasnt sure if this would work since they are usually junk right out of the package. Not to mention, the gear oil is usually so damn thick that i wasnt sure it would siphon through a hole that small.

chico · 09-09-2002, 07:30 PM

Synthetic for tranny and engine. You need to stay with reg. gear oil use friction modifier if you are running any type of equal lock (posi).

lx5091 · 09-09-2002, 07:34 PM

Quote:

Originally posted by chico
Synthetic for tranny and engine. You need to stay with reg. gear oil use friction modifier if you are running any type of equal lock (posi).

...you need to..............................why?

chico · 09-09-2002, 07:41 PM

go to gear swap...

Coupe50h · 09-09-2002, 09:29 PM

Naw the bulb kind no good for gear oil,

I have one that has a pump on top kinda like pumping ketchup out of a big container you know...?

it's simple
btw, the guy that rebuilt my t-5 says that he doesnt use synthetics in his t-5's. (for the comment above) but i dont see what it would hurt except your wallet.

09-09-2002, 12:20 PM	#1
scale Registered Member Join Date: Mar 2000 Location: minneapolis, mn Posts: 158	gear oil? I had my gears swapped to 373s about 2 years ago. I put about 500 miles on right away but now it has been sitting since then. I want to change my gear oil as well as all my other fluids before taking it out. What type of gear oil should i put in my rear end? I have heard that ford uses a special kind that you have to get from the dealer. I dont wanna use the wrong thing. Also, are there any tricks to filling it? How much oil should it take? I dont wanna over or under fill it. Usually you just fill up until it comes out the fill hole Also does anyone have any tricks for filling up? I dont have a professional pump and it is impossible with a funnel since the hole is in a tight spot and also on the side of the housing. Thanks __________________ 1991 LX coupe,AOD, red, 80k, K&N, MAC cat back, MAC off-road X, Autometer Gauges, BBK Ceramic unequals, fully polished upper intake, fuel rails, and egr, working on installing.....MM full length subs, H&R sport springs, MM Lower control arms, MM caster camber plates, bilstein shocks, struts.

09-09-2002, 12:27 PM	#2
95mustanggt Registered Member Join Date: May 2000 Location: Kamloops, BC Posts: 2,875	When Lone Star Performance (Dallas TX) did my 3.73's they used Redline Synthetic Gear oil (80 or 90 weight I believe). I'm not aware of any special lubricant required. __________________ 1995 Mustang GT 20016 F150 Lariat Super Crew

09-09-2002, 12:32 PM	#3
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	yea man, you can squeeze that oil in usually, but last time i spilled more than i got in, now i have an 8$ pump/syphon, that makes it a whole lot easier....... as far as type of oil, use differential gear oil, read the back and make sure it is for limited slip, you have to add an additive called 'friction modifier' the dealer gear oil already has this mixed if im not mistaken, i just added a tube of it to my 80w90 coastal oil, everything is fine so far, some people use synthetic but i see no point in it. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

09-09-2002, 01:56 PM	#4
andy669 Registered Member Join Date: Jan 2001 Location: Moline Il Posts: 901	I like the synthetic gear oil. You dont need the friction modifier additive with it either. Andy __________________ 88 coupe 91 LX NMRA Pure Street 5120

09-09-2002, 02:51 PM	#5
scale Registered Member Join Date: Mar 2000 Location: minneapolis, mn Posts: 158	ya i was thinking of getting a crappy little siphon hose like they sell at any walmart (has a little bulb for a pump) but i wasnt sure if this would work since they are usually junk right out of the package. Not to mention, the gear oil is usually so damn thick that i wasnt sure it would siphon through a hole that small. __________________ 1991 LX coupe,AOD, red, 80k, K&N, MAC cat back, MAC off-road X, Autometer Gauges, BBK Ceramic unequals, fully polished upper intake, fuel rails, and egr, working on installing.....MM full length subs, H&R sport springs, MM Lower control arms, MM caster camber plates, bilstein shocks, struts.

09-09-2002, 07:30 PM	#6
chico Registered Member Join Date: Jul 2002 Location: Manteca,Ca. Posts: 114	rear end gear oil Synthetic for tranny and engine. You need to stay with reg. gear oil use friction modifier if you are running any type of equal lock (posi). __________________ 98 cobra convt. 515 rwhp 421 torque..554 rwhp on 98 octane..635 rwhp this summer

09-09-2002, 07:41 PM	#8
chico Registered Member Join Date: Jul 2002 Location: Manteca,Ca. Posts: 114	rear end oil go to gear swap... __________________ 98 cobra convt. 515 rwhp 421 torque..554 rwhp on 98 octane..635 rwhp this summer

09-09-2002, 09:29 PM	#9
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	Naw the bulb kind no good for gear oil, I have one that has a pump on top kinda like pumping ketchup out of a big container you know...? it's simple btw, the guy that rebuilt my t-5 says that he doesnt use synthetics in his t-5's. (for the comment above) but i dont see what it would hurt except your wallet. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

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