Hey, I'm gonna do the A4LD to T-5 swap soon. I'm gathering all the parts together, but I had a question. I've got a 93 4 cylinder with the 3.73 rear end. Do I need to change the speedo gear when I install my t-5 or use my old one? I think I heard the manual rear ends had 3.55s. Also, if I need a different one, does anyone know the number of teeth on the drive gear of the A4LD and the T-5s? Need to figure out what driven gear I need to get if different. Thanx!
T-5 swap speedo gear question
- Thread starter Saiboot
- Start date
The manual cars had 3.45 rears. Most T5's have the 7 tooth drive gear but there's a 6 tooth gear found in some. You'll need the tag number off your T5 to determine the speedo drive gear tooth count.
After that, its just a matter of some simple math to figure out the driven gear tooth count.
The driven gears are different between the auto and the 5spd. Stinger says he just cut the extra length of the tip off of the automatic gear and used it in his T5, though I don't remember how accurate his speedo was.
After that, its just a matter of some simple math to figure out the driven gear tooth count.
The driven gears are different between the auto and the 5spd. Stinger says he just cut the extra length of the tip off of the automatic gear and used it in his T5, though I don't remember how accurate his speedo was.
The tag on my tranny is 1352209. Is there somewhere I can find out the gear by way of that? I think I saw that the color could indicate the teeth too, which i know is yellow. 7 sound right for that?
Yea, I remember reading abt grinding the gear in Stinger's article, but I want to get as close as I can to accurate, and it doesn't specify whether how much it'd be off, or if it would be.
Yea, I remember reading abt grinding the gear in Stinger's article, but I want to get as close as I can to accurate, and it doesn't specify whether how much it'd be off, or if it would be.
Stinger
Founding Member
My speedo was accurate, I wouldn't have done it that way if it wasn't. The auto trans already has the correct gear for your rear gears, just grind the end off and use it.
Roland69
Sergeant Tangnet
Manual Transmissions with 6 Tooth Drive Gear
Not found in OEM applications
Item Number
Description
N/A
3.08 Gear Ratio / Not possible
C0DZ-17271-A
3.27 Gear Ratio / Maroon 16 Speedo Gear
C3DZ-17271-C
3.55 Gear Ratio / White 17 Speedo Gear
C0DD-17271-B
3.73 Gear Ratio / Yellow 18 Speedo Gear
C0DZ-17271-B
3.90 Gear Ratio / Pink 19 Speedo Gear
C1DZ-17271-A
4.10 Gear Ratio / Black 20 Speedo Gear
C4OZ-17271-A
4.30 Gear Ratio / Red 21 Speedo Gear
Manual Transmissions with 7 Tooth Drive Gear
1983-1989 T-5 OEM
Pre 1993 T-5 Aftermarket
1996-1998 Cobra T-45 OEM
All Tremec Transmissions
Item Number
Description
C0DZ-17271-A
2.73 Gear Ratio / Maroon 16 Speedo Gear
C0DD-17271-B
3.08 Gear Ratio / Yellow 18 Speedo Gear
C0DZ-17271-B
3.27 Gear Ratio / Pink 19 Speedo Gear
C1DZ-17271-A
3.55 Gear Ratio / Black 20 Speedo Gear
C4OZ-17271-A
3.73 Gear Ratio / Red 21 Speedo Gear
Jeep Part #j3167393
4.10 Gear Ratio / White 23 Speedo Gear
Manual Transmissions with 8 Tooth Drive Gear
1990-1995 T-5 OEM
1996-1998 T-45 OEM Except Cobra
Item Number
Description
C0DD-17271-B
2.73 Gear Ratio / Yellow 18 Speedo Gear
C1DZ-17271-A
3.08 Gear Ratio / Black 20 Speedo Gear
C4OZ-17271-A
3.27 Gear Ratio / Red 21 Speedo Gear
Jeep Part #j3167393
3.55 Gear Ratio / White 23 Speedo Gear
Jeep Part #j3167393
3.73 Gear Ratio / White 23 Speedo Gear (Not 100% accurate. This combination will offer the best accuracy without changing the drive gear. Change drive gear to a 6 tooth for complete accuracy. See 6 tooth table.)
Jeep Part #j3167393
4.10 Gear Ratio / White 23 Speedo Gear (Not 100% accurate. This combination will offer the best accuracy without changing the drive gear. Change drive gear to a 6 tooth for complete accuracy. See 6 tooth table.)
Automatic Transmissions with 7 Tooth Drive Gear
1983-1989 Automatic Transmissions
Item Number
Description
D0AZ-17271-A
2.73 Gear Ratio / Blue 16 Speedo Gear
C7AZ-17271-B
3.08 Gear Ratio / Gray 18 Speedo Gear
C7VY-17271-A
3.27 Gear Ratio / Tan 19 Speedo Gear
C8SZ-17271-B
3.55 Gear Ratio / Orange 20 Speedo Gear
D0OZ-17271-B
3.73 Gear Ratio / Purple 21 Speedo Gear
Jeep Part #j3167393
4.10 Gear Ratio / White 23 Speedo Gear
Automatic Transmissions with 8 Tooth Drive Gear
1990-1998 Automatic Transmissions
Item Number
Description
C7AZ-17271-B
2.73 Gear Ratio / Gray 18 Speedo Gear
C8SZ-17271-B
3.08 Gear Ratio / Orange 20 Speedo Gear
D0OZ-17271-B
3.27 Gear Ratio / Purple 21 Speedo Gear
Jeep Part #j3167393
3.55 Gear Ratio / White 23 Speedo Gear
Jeep Part #j3167393
3.73 Gear Ratio / White 23 Speedo Gear (Not 100% accurate.)
Jeep Part #j3167393
4.10 Gear Ratio / White 23 Speedo Gear (Not 100% accurate.)
Now if you really want to change the internal drive gear of your manual tranny you can match it according to the table below. Be aware that the 6 tooth will offer the most combos for numerically higher gear ratios and offer the greatest degree of accuracy. The 6 tooth gear selection table for a manual tranny is the first in the page.
Item Number
Description
E3ZZ-17285-B
6 Tooth Internal Drive Gear / Black
E3ZZ-17285-A
7 Tooth Internal Drive Gear / Yellow
F0ZZ-17285-A
8 Tooth Internal Drive Gear / Green
Not found in OEM applications
Item Number
Description
N/A
3.08 Gear Ratio / Not possible
C0DZ-17271-A
3.27 Gear Ratio / Maroon 16 Speedo Gear
C3DZ-17271-C
3.55 Gear Ratio / White 17 Speedo Gear
C0DD-17271-B
3.73 Gear Ratio / Yellow 18 Speedo Gear
C0DZ-17271-B
3.90 Gear Ratio / Pink 19 Speedo Gear
C1DZ-17271-A
4.10 Gear Ratio / Black 20 Speedo Gear
C4OZ-17271-A
4.30 Gear Ratio / Red 21 Speedo Gear
Manual Transmissions with 7 Tooth Drive Gear
1983-1989 T-5 OEM
Pre 1993 T-5 Aftermarket
1996-1998 Cobra T-45 OEM
All Tremec Transmissions
Item Number
Description
C0DZ-17271-A
2.73 Gear Ratio / Maroon 16 Speedo Gear
C0DD-17271-B
3.08 Gear Ratio / Yellow 18 Speedo Gear
C0DZ-17271-B
3.27 Gear Ratio / Pink 19 Speedo Gear
C1DZ-17271-A
3.55 Gear Ratio / Black 20 Speedo Gear
C4OZ-17271-A
3.73 Gear Ratio / Red 21 Speedo Gear
Jeep Part #j3167393
4.10 Gear Ratio / White 23 Speedo Gear
Manual Transmissions with 8 Tooth Drive Gear
1990-1995 T-5 OEM
1996-1998 T-45 OEM Except Cobra
Item Number
Description
C0DD-17271-B
2.73 Gear Ratio / Yellow 18 Speedo Gear
C1DZ-17271-A
3.08 Gear Ratio / Black 20 Speedo Gear
C4OZ-17271-A
3.27 Gear Ratio / Red 21 Speedo Gear
Jeep Part #j3167393
3.55 Gear Ratio / White 23 Speedo Gear
Jeep Part #j3167393
3.73 Gear Ratio / White 23 Speedo Gear (Not 100% accurate. This combination will offer the best accuracy without changing the drive gear. Change drive gear to a 6 tooth for complete accuracy. See 6 tooth table.)
Jeep Part #j3167393
4.10 Gear Ratio / White 23 Speedo Gear (Not 100% accurate. This combination will offer the best accuracy without changing the drive gear. Change drive gear to a 6 tooth for complete accuracy. See 6 tooth table.)
Automatic Transmissions with 7 Tooth Drive Gear
1983-1989 Automatic Transmissions
Item Number
Description
D0AZ-17271-A
2.73 Gear Ratio / Blue 16 Speedo Gear
C7AZ-17271-B
3.08 Gear Ratio / Gray 18 Speedo Gear
C7VY-17271-A
3.27 Gear Ratio / Tan 19 Speedo Gear
C8SZ-17271-B
3.55 Gear Ratio / Orange 20 Speedo Gear
D0OZ-17271-B
3.73 Gear Ratio / Purple 21 Speedo Gear
Jeep Part #j3167393
4.10 Gear Ratio / White 23 Speedo Gear
Automatic Transmissions with 8 Tooth Drive Gear
1990-1998 Automatic Transmissions
Item Number
Description
C7AZ-17271-B
2.73 Gear Ratio / Gray 18 Speedo Gear
C8SZ-17271-B
3.08 Gear Ratio / Orange 20 Speedo Gear
D0OZ-17271-B
3.27 Gear Ratio / Purple 21 Speedo Gear
Jeep Part #j3167393
3.55 Gear Ratio / White 23 Speedo Gear
Jeep Part #j3167393
3.73 Gear Ratio / White 23 Speedo Gear (Not 100% accurate.)
Jeep Part #j3167393
4.10 Gear Ratio / White 23 Speedo Gear (Not 100% accurate.)
Now if you really want to change the internal drive gear of your manual tranny you can match it according to the table below. Be aware that the 6 tooth will offer the most combos for numerically higher gear ratios and offer the greatest degree of accuracy. The 6 tooth gear selection table for a manual tranny is the first in the page.
Item Number
Description
E3ZZ-17285-B
6 Tooth Internal Drive Gear / Black
E3ZZ-17285-A
7 Tooth Internal Drive Gear / Yellow
F0ZZ-17285-A
8 Tooth Internal Drive Gear / Green
