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Z-T5 question

  • Thread starter Thread starter SRT
  • Start date Start date Feb 9, 2007

SRT

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Jan 7, 2007
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Feb 9, 2007
#1
  • Feb 9, 2007
  • #1

Hey guys, new to this forum, I have an 88 gt conv with the zt5 and 355 gears, the question is that the zt5 has 7 tooth spedo gear, and my stock t5 had an 8 tooth spedo gear....does it make any difference when i go to buy the correct 20 tooth spedo cable gear???
 
S

Silvers

New Member
Jan 4, 2007
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Feb 9, 2007
#2
  • Feb 9, 2007
  • #2
Im about to put a t5z in my car. The place where i had it rebuilt said that my spedo gear would work but who knows.
The t5z was designed to be a direct bolt up HD trans. I don't know why ford would change something like the speedo gear.
I was just told that 89s and below have 7 teeth and 90-95 have 8 teeth.
7= 20 tooth cable gear with 355s
8= 23 tooth cable gear with 355s
T5Z =7 tooth
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,265
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Massachusetts
Feb 9, 2007
#3
  • Feb 9, 2007
  • #3
If the T-5 that came out of your '88 had an 8-tooth drive gear, then it was not the original transmission.

Up until '89, the t-5 had a 7-tooth drive gear
 

Snikt89GT

New Member
Sep 6, 2006
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Deland, Florida
Feb 9, 2007
#4
  • Feb 9, 2007
  • #4
Yeah unless you have the wierd late '89 T5 like I have, which has an 8T gear and is 300ft-lb capacity instead of 265
 

lutzgt86-91

Founding Member
Feb 20, 2002
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Homer IL
Feb 10, 2007
#5
  • Feb 10, 2007
  • #5
Snikt some 89 to 93 came with what Ford called a service trans with a 300 ftlbs capacity they also had a diffrent 2nd and 3rd gear ratio 1.99 2nd 1.33 3rd the tage number on your trans should be 199 or above I have three of these trans and they work good
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,265
17,952
224
Massachusetts
Feb 10, 2007
#6
  • Feb 10, 2007
  • #6
lutzgt86-91 said:
Snikt some 89 to 93 came with what Ford called a service trans with a 300 ftlbs capacity they also had a diffrent 2nd and 3rd gear ratio 1.99 2nd 1.33 3rd the tage number on your trans should be 199 or above I have three of these trans and they work good
Click to expand...

199 is a factory 90-93 T-5.

You are right about the Service trans. It was actually installed in 85-89 Mustangs and had a 300 ft-lb rating and a unique 2nd and 3rd ratio.

The trans buck code on these transmissions is 1352-52-204
 

Snikt89GT

New Member
Sep 6, 2006
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Deland, Florida
Feb 10, 2007
#7
  • Feb 10, 2007
  • #7
Since it's a "service trans" does that mean it was replaced under warranty or something?

According to mustanggt.org:

Tranny
Part Number 1st 2nd 3rd 4th 5th R Torque Capacity
lbs-ft

5-speed T5 (1989)8
E9ZR-7003-A 3.35 1.99 1.33 1.00 0.675 3.15 300

8 - This gearbox was introduced as a running 1989 upgrade. It has an 8-tooth speedo drive gear.
 

SRT

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Jan 7, 2007
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Feb 10, 2007
#8
  • Feb 10, 2007
  • #8
Excellent, thanks I thought the 88 had a stock 8 tooth gear, thanks for the info guys.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,265
17,952
224
Massachusetts
Feb 10, 2007
#9
  • Feb 10, 2007
  • #9
If you take your speedo cable out of the trans and take a peek up inside, you should see a yellow worm gear. That would be the 7-tooth
 

SRT

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Jan 7, 2007
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#10
  • Feb 10, 2007
  • #10
Thanks I'll put it up on the lift tommorow.
 

lutzgt86-91

Founding Member
Feb 20, 2002
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Homer IL
Feb 10, 2007
#11
  • Feb 10, 2007
  • #11
Snikt it was just a name they gave it
 
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