how i can find out if my car got gears?

Hethj7 · 12-01-2004, 01:48 PM

Taking the cover off and changing the fluid probably isn't a bad idea, but if you just want to know if you have gears, try this. Put the rear of the car up in the air, but not supported at the wheels. Put the tranny in neutral and then spin your wheels by hand. Count how many times your driveshaft turns for one revolution of the wheel. If it spins about 3.5 times for one wheel revolution, you probably have a 3.55 gear out back. Get it?

GhettoPop · 12-01-2004, 02:03 PM

Quote:

Originally Posted by Hethj7

Put the rear of the car up in the air, but not supported at the wheels. Put the tranny in neutral and then spin your wheels by hand. Count how many times your driveshaft turns for one revolution of the wheel.

yes this works, 2.73, 3.08, etc revolutions

Dark_5.0 · 12-01-2004, 05:41 PM

jacking up the rear and turning the tire one revolution and counting the revolutions on the driveshaft only works if your posi is in great shape. Both wheels have to make 1 complete revolution.

If your posi is fried and only 1 wheel turns counting the revolutions wont work.

Hethj7 · 12-01-2004, 07:03 PM

Quote:

Originally Posted by Dark_5.0

jacking up the rear and turning the tire one revolution and counting the revolutions on the driveshaft only works if your posi is in great shape. Both wheels have to make 1 complete revolution.

If your posi is fried and only 1 wheel turns counting the revolutions wont work.

Good point, I hadn't thought about that. I guess he can jack it up and try it, but what's the odds of the clutch packs being in good shape in that car? Probably not too good.

GhettoPop · 12-02-2004, 04:28 PM

so if both wheels spin the posi is 100% or close to it?
if only 1 spins, the posi is shot?

~The Jester~ · 12-02-2004, 05:22 PM

If both wheels spin, the clutches/sliders are good enough to hold with the wheels in the air, and almost zero load.

Not necessarily 100% or even close to it for that matter. Puttin the horse back on the ground, and putting all the other horses through the driveshaft may say the clutches/sliders are worn out, but it still might have enough grab for this test. On the other hand, if the posi won't grab with the wheels in the air, then it's DEFINITELY worn out. With me?

As far as the test goes, if both wheels spin, it's a very easy way to figure out what gears are back there. I always mark the driveshaft with a grease pencil, inline with a landmark on the diff. case. Works pretty good!

StockRustang · 12-02-2004, 10:02 PM

really you should be able to tell by the way it goes through the gears, especially if its stock, especially if you'v owned other 5.0's.

12-01-2004, 01:48 PM	#1
Hethj7 Mizzou Tigers Join Date: Apr 1999 Location: weston, MO United States Posts: 1,455	Re: how i can find out if my car got gears? Taking the cover off and changing the fluid probably isn't a bad idea, but if you just want to know if you have gears, try this. Put the rear of the car up in the air, but not supported at the wheels. Put the tranny in neutral and then spin your wheels by hand. Count how many times your driveshaft turns for one revolution of the wheel. If it spins about 3.5 times for one wheel revolution, you probably have a 3.55 gear out back. Get it? __________________ 2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244

12-01-2004, 05:41 PM	#3
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Re: how i can find out if my car got gears? jacking up the rear and turning the tire one revolution and counting the revolutions on the driveshaft only works if your posi is in great shape. Both wheels have to make 1 complete revolution. If your posi is fried and only 1 wheel turns counting the revolutions wont work. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

12-02-2004, 04:28 PM	#5
GhettoPop Gimme a Drink! Join Date: Dec 2002 Location: NYC Posts: 694	Re: how i can find out if my car got gears? so if both wheels spin the posi is 100% or close to it? if only 1 spins, the posi is shot? __________________ 1990 GT,stock T-5,K&N w/o air silencer,March underdrives,FMS wires,timing@14*,PA Perf 130amp alt,Steeda Tri-Ax Shifter,Steeda adj quadrant/clutch cable/firewall adj,Centerforce II clutch,o/r x-pipe,Magnaflow SS catback,g-load brace, subframes,Bilstein struts/shocks,Autometer gauges, 136k and running strong!

12-02-2004, 05:22 PM	#6
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: how i can find out if my car got gears? If both wheels spin, the clutches/sliders are good enough to hold with the wheels in the air, and almost zero load. Not necessarily 100% or even close to it for that matter. Puttin the horse back on the ground, and putting all the other horses through the driveshaft may say the clutches/sliders are worn out, but it still might have enough grab for this test. On the other hand, if the posi won't grab with the wheels in the air, then it's DEFINITELY worn out. With me? As far as the test goes, if both wheels spin, it's a very easy way to figure out what gears are back there. I always mark the driveshaft with a grease pencil, inline with a landmark on the diff. case. Works pretty good! __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

12-02-2004, 10:02 PM	#7
StockRustang Registered Member Join Date: Dec 2004 Location: Chitown Posts: 39	Re: how i can find out if my car got gears? really you should be able to tell by the way it goes through the gears, especially if its stock, especially if you'v owned other 5.0's. __________________ 85 GT-currently: 8.8 with 4.10 and richmond spool, 31spline strange axles, Ties, GMS rear controll arms, stock rear springs, 50/50's, 90/10's up front with 4cyl springs, PA K-member and A-arms, and a motor i still cant decide what to do with.

Thread Tools
Show Printable Version Email this Page
Display Modes	Rate This Thread
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode	Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Rear End Gears	raptor	Windsor Power	13	11-01-2002 01:33 AM
new owner ....gears?	spyder210	Modular Madness	3	05-26-2002 10:35 PM
Gears Gears Gears!!!!	COBRAon18s	Modular Madness	20	05-13-2002 04:44 PM
New gears in ONE WEEK	todd95GT	Windsor Power	4	10-09-2001 11:48 PM
I want to change rear gears myself	dave301	Windsor Power	2	01-28-2001 03:37 PM