Gear Ratios for the So-Called WC T-5
Thread Starter
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Gear Ratios for the So-Called WC T-5
The ratio for my 85 LG4 with T-5 are as follows: 2.95, 1.94. 1.34, 1.00, and .63. Is the 88-92 version any different?
JamesC
JamesC
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
No different.
Some have a .73 5th gear, in both the 1st design and 2nd design. The low-perf cars (LG4 & L03) got the poorer .63, the high-perf cars (L69 & LB9) got the better .73.
Some have a .73 5th gear, in both the 1st design and 2nd design. The low-perf cars (LG4 & L03) got the poorer .63, the high-perf cars (L69 & LB9) got the better .73.
Thread Starter
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Is there a way to determine which 88-92 T-5 has the .63 and which has the .73 without digging into the guts--I wouldn't know what I was looking at anyway?
JamesC
JamesC
Thread Starter
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
By the way, some of these later T-5's had electronic speedos. Would that be a problem for my mechanical speedo?
JamesC
JamesC
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
To determine the ratio, put it in 5th, turn the output shaft 10 times, count how many revolutions the clutch gear makes..... 6.3, or 7.3.
No the VSS thing is no problem whatsoever. The hole in the transmission is identical whether it came equipped with a cable "sleeve" or a VSS. Unbolt the one, install the other. The drive gear on the output shaft is even the same, for any given rear gear ratio.
No the VSS thing is no problem whatsoever. The hole in the transmission is identical whether it came equipped with a cable "sleeve" or a VSS. Unbolt the one, install the other. The drive gear on the output shaft is even the same, for any given rear gear ratio.
Joined: Sep 2004
Posts: 5,906
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
We found out the hard way that is not true on a 700r4, I'm not sure of a T5, but on a 700r4 its not.
His trans went and we had to swap a trans from a TA with 2.77's into his 3.23 V6 bird with a V8 swap. His speedo reported pretty high
His trans went and we had to swap a trans from a TA with 2.77's into his 3.23 V6 bird with a V8 swap. His speedo reported pretty high
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Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
Manual & auto are different.
In a manual, cable & VSS are identical.
I know this to be so, because I ran a 91 T-5 in my 83 car for quite some time; still have the VSS laying around in fact. AAMOF you could take that same VSS and put it into a 1960s T-10 or Muncie if you wanted to.
In a manual, cable & VSS are identical.
I know this to be so, because I ran a 91 T-5 in my 83 car for quite some time; still have the VSS laying around in fact. AAMOF you could take that same VSS and put it into a 1960s T-10 or Muncie if you wanted to.
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