Just Got gear installed!!!! Urgent

JamGtStang · 04-14-2001, 08:44 AM

I say urgent cuz because of the speedo gears... i dont want to get another ticket!!

i just got my gears installed and the speedo gear, but i think my speedometer is wayyyyyyyy off is that normal? i got the 21 speedo gear and i have 16inch rims
another think is that if i drive my car lets say for 15 minutes the temp goes to the middle of the gauge between the o and r is this normal?

NOS_Notch · 04-14-2001, 11:44 AM

What gear did you have originally and what did you go to??
If you check your door panel the ax. codes are these...
m=2.73
z=3.08
e=3.27
Depending how much change you made..is how many teeth you need on the speedo gear.
I went from 2.73-4.10 and cannot correct the gear completely w/ out a different cable head or something. (thats what i'm told anyway)
Temp sounds like a bad t-stat maybe...should stay in about the bottom third of the range.

------------------
4.10's,long tubes & 75 shot...Goes 12.50's
Check it out at http://www.burnouts.webprovider.com

JamGtStang · 04-14-2001, 01:15 PM

i went from 3:08s to 3:73 and i changed the speedometer gear (21) did i mention that my car have this weird sound now its like an airplane or something

that temp prob is driving me crazy
thanks

04-14-2001, 02:52 PM

That sound that sounds like an airplane is your rearend. Better get used to it cuz thats the noise they make cuz they are spinning faster than they normally would.

------------------
'93 Gt, Stock as a rock, but plan an AOD to T-5 swap, steeda tri-ax shifter, 3.55's, cobra intake, gt-40 irons, e303 cam, 1.6 rr's, mac headers, off road h-pipe, flowmasters cat back, msd ignition, blaster coil, mac cold air box (fenderwell), eibach springs, silver cobra r's, and an obnoxiously large mustang in the back window =0)

dinomite · 04-14-2001, 07:49 PM

I've never had gears done, but from what I hear, if they are making noise, the gears aren't ligned up right and you should head your *** back to the shop.

Rick 91GT · 04-15-2001, 09:15 AM

Quote:

Originally posted by dinomite:
I've never had gears done, but from what I hear, if they are making noise, the gears aren't ligned up right and you should head your *** back to the shop.

He's right your gears should NOT be whining, if they are they are set to tight and will wear out. I would get you car back to the shop as soon as you can so they will stand behind their work.

As far as getting your speedo right what NOS_Notch was eluding to was some times it is possible that you need to change the gear that is in the tailshaft of the tranny, I am running a red ford gear on the speedo cable with (I believe) a 6 tooth yellow gear in the tailshaft. I am swapping to 4:30 gears and there isn't correct combo out to make the speedo correct.

------------------
Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!

jimberg · 04-16-2001, 03:11 PM

Did you say what year your Mustang is and what kind of speedo it has? I have an 89 1/2 Mustang since it has an 140mph speedo. Charts tell me I need to go to a 20 tooth if I have 3.55 gears, but in reality I need to go to a 23 tooth. If you have an 89 with a 140mph speedo, follow the 1990 chart and not the pre-1989 chart for gears.

------------------
351W 89 Mustang GT Convertible

fastang · 04-16-2001, 03:24 PM

GO BACK! Your gears definitley shouldnt make noise. They will build up too much heat and explode. They whine for a while, then it sounds like a helicopter is about to land on you car kinda like a huge WHOOMP WHOOMP sorta sound then BOOM! your whole rearend is scattered all over the freeway. Make sure its not your driveshaft making the noise though. My DS started to whine after my gear change but only because the U joints were toast. Defintitely have them checked out.

------------------
95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, BBK Longtubes, Flowmaster cat back, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, FMS aluminum driveshaft, weld in subframe connectors

JamGtStang · 04-17-2001, 08:39 AM

How do i check if is the driveshaft? and r u guys sure that's a problem cuz i thought that noise was because the driveshaft was spinning faster

thanx

fiveohpatrol · 04-17-2001, 08:50 AM

your driveshaft isnt spinning any faster at all, it just accelerates faster than before, if you are at 3000RPM with 2.73s and 3000PRM with 3.73s then your driveshaft is spinning the same speed with both of them, and to answer your question, yes it is a problem and you need to have it re-done ASAP, just ask around here theres lots of guys without excessive gear whine, yours were installed improperly

------------------
88 Notchback 5.0, 3.73's, Explorer intake, pulleys, Crane 1.7's, BBK headers, off-road H-pipe, flowmasters, subframe connectors, 65mm TB, shift kit, March ram air kit, motorsport wires, MSD coil, upper and lower control arms, 155lph fuel pump, cheap 2800 stall, Crane Adj.FPR, best time- 13.99@99.75, not yet tested times after rocker and intake install

04-14-2001, 08:44 AM	#1
JamGtStang Registered Member Join Date: Dec 2000 Location: Miami, Fl Posts: 58	Just Got gear installed!!!! Urgent I say urgent cuz because of the speedo gears... i dont want to get another ticket!! i just got my gears installed and the speedo gear, but i think my speedometer is wayyyyyyyy off is that normal? i got the 21 speedo gear and i have 16inch rims another think is that if i drive my car lets say for 15 minutes the temp goes to the middle of the gauge between the o and r is this normal?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
raced a Supra Twin Turbo	Stang35th	Stang Stories	63	08-23-2003 12:36 AM
The Right Speedo Gear...	Titan	Modular Madness	8	09-23-2002 05:42 PM
Distributor gear.... is it steel?	DRASTiK	Windsor Power	5	01-09-2002 12:37 AM
Urgent Help!!!!Just installed aluminum heads on backwards...Will it work OK???	tb	Windsor Power	5	12-31-2001 12:53 AM
If you've installed a 7 tooth speedo drive gear please read!	bigsnake	Windsor Power	3	11-25-2001 06:51 PM

04-14-2001, 11:44 AM	#2
NOS_Notch Registered Member Join Date: Sep 2000 Location: Fresno,CA. USA Posts: 384	What gear did you have originally and what did you go to?? If you check your door panel the ax. codes are these... m=2.73 z=3.08 e=3.27 Depending how much change you made..is how many teeth you need on the speedo gear. I went from 2.73-4.10 and cannot correct the gear completely w/ out a different cable head or something. (thats what i'm told anyway) Temp sounds like a bad t-stat maybe...should stay in about the bottom third of the range. ------------------ 4.10's,long tubes & 75 shot...Goes 12.50's Check it out at http://www.burnouts.webprovider.com

04-14-2001, 01:15 PM	#3
JamGtStang Registered Member Join Date: Dec 2000 Location: Miami, Fl Posts: 58	i went from 3:08s to 3:73 and i changed the speedometer gear (21) did i mention that my car have this weird sound now its like an airplane or something that temp prob is driving me crazy thanks

04-14-2001, 02:52 PM	#4
Bangin Gears Guest Posts: n/a	That sound that sounds like an airplane is your rearend. Better get used to it cuz thats the noise they make cuz they are spinning faster than they normally would. ------------------ '93 Gt, Stock as a rock, but plan an AOD to T-5 swap, steeda tri-ax shifter, 3.55's, cobra intake, gt-40 irons, e303 cam, 1.6 rr's, mac headers, off road h-pipe, flowmasters cat back, msd ignition, blaster coil, mac cold air box (fenderwell), eibach springs, silver cobra r's, and an obnoxiously large mustang in the back window =0)

04-14-2001, 07:49 PM	#5
dinomite The Dude Join Date: Feb 2001 Location: Arlington, VA Posts: 1,262	I've never had gears done, but from what I hear, if they are making noise, the gears aren't ligned up right and you should head your *** back to the shop.

04-16-2001, 03:11 PM	#7
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	Did you say what year your Mustang is and what kind of speedo it has? I have an 89 1/2 Mustang since it has an 140mph speedo. Charts tell me I need to go to a 20 tooth if I have 3.55 gears, but in reality I need to go to a 23 tooth. If you have an 89 with a 140mph speedo, follow the 1990 chart and not the pre-1989 chart for gears. ------------------ 351W 89 Mustang GT Convertible

04-16-2001, 03:24 PM	#8
fastang Registered Member Join Date: Aug 2000 Location: santa ana ca Posts: 1,349	GO BACK! Your gears definitley shouldnt make noise. They will build up too much heat and explode. They whine for a while, then it sounds like a helicopter is about to land on you car kinda like a huge WHOOMP WHOOMP sorta sound then BOOM! your whole rearend is scattered all over the freeway. Make sure its not your driveshaft making the noise though. My DS started to whine after my gear change but only because the U joints were toast. Defintitely have them checked out. ------------------ 95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, BBK Longtubes, Flowmaster cat back, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, FMS aluminum driveshaft, weld in subframe connectors

04-17-2001, 08:39 AM	#9
JamGtStang Registered Member Join Date: Dec 2000 Location: Miami, Fl Posts: 58	How do i check if is the driveshaft? and r u guys sure that's a problem cuz i thought that noise was because the driveshaft was spinning faster thanx

04-17-2001, 08:50 AM	#10
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	your driveshaft isnt spinning any faster at all, it just accelerates faster than before, if you are at 3000RPM with 2.73s and 3000PRM with 3.73s then your driveshaft is spinning the same speed with both of them, and to answer your question, yes it is a problem and you need to have it re-done ASAP, just ask around here theres lots of guys without excessive gear whine, yours were installed improperly ------------------ 88 Notchback 5.0, 3.73's, Explorer intake, pulleys, Crane 1.7's, BBK headers, off-road H-pipe, flowmasters, subframe connectors, 65mm TB, shift kit, March ram air kit, motorsport wires, MSD coil, upper and lower control arms, 155lph fuel pump, cheap 2800 stall, Crane Adj.FPR, best time- 13.99@99.75, not yet tested times after rocker and intake install