Decode my rear end and which ecu please

J

Juggalo95

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May 27, 2007

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Sep 21, 2007

#1

• Sep 21, 2007

• #1

Ok my car is a 95 GTS Aode car...heres the numbers on the rear end tag...(car is all stock) 3L 27 88 4M13 What do those numbers mean also there were another set of numbers on the tag S2310.

Which ecu does my car have? How to find out which one?

 

toyman

10 Year Member

Jul 19, 2007

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Sep 21, 2007

#2

• Sep 21, 2007

• #2

The axle code is on the door jam sticker. It will be a letter(s) under the letters AX. The ECU is most likely U4P0. You will have to remove the passenger side kick panel to access the ECU if you want a visual confirmation.

 

J

Juggalo95

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May 27, 2007

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Sep 21, 2007

#3

• Sep 21, 2007

• #3

OK I think the letter is E..what woul that be?

 

bill302

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Nov 2, 2005

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alabama,gadsden

Sep 21, 2007

#4

• Sep 21, 2007

• #4

3L27 means axle came stock with 3.27 gears and L means limited slip (posi).the 88 is actually 8.8 which means 8.8 rear end..4M13 is the date build code 4=94,M= december,13=13th day...

 

toyman

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#5

• Sep 21, 2007

• #5

Juggalo95 said:

OK I think the letter is E..what woul that be?

Click to expand...

"E" says its a 3.27 limited slip (posi) diff as confirmed by bill302.

 

J

Juggalo95

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May 27, 2007

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Sep 22, 2007

#6

• Sep 22, 2007

• #6

Sweet...so some of these had the 2.73? also...why would they put that in a auto?

 

final5-0

Mustang Master

Apr 6, 2003

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DFW Texas

Sep 22, 2007

#7

• Sep 22, 2007

• #7

94-95 Stang PCM's

T4M0 = GT stick trans
U4P0 = GT auto trans
W4H0 = GT auto trans
J4J1 = Cobra
ZAO = Cobra R

Grady

 

B

bmac50

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Oct 18, 2006

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Sep 22, 2007

#8

• Sep 22, 2007

• #8

Juggalo95 said:

Sweet...so some of these had the 2.73? also...why would they put that in a auto?

Click to expand...

An auto was for mose sales as some don't want to fool around with shifting in traffic. The 2.73 was more of a road gear.

 

toyman

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#9

• Sep 22, 2007

• #9

final5-0 said:

94-95 Stang PCM's

T4M0 = GT stick trans
U4P0 = GT auto trans
W4H0 = GT auto trans
J4J1 = Cobra
ZAO = Cobra R

Grady

Click to expand...

Wasn't the W4H0 the PCM for the auto with a 2.73 gear only? If that's the case would swapping a W4H0 for the U4P0 advance or delay the shift with steeper gears? I'm thinking that advancing the shift is the correct answer and that's not the way I want to go.

 

final5-0

Mustang Master

Apr 6, 2003

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Sep 22, 2007

#10

• Sep 22, 2007

• #10

toyman said:

Wasn't the W4H0 the PCM for the auto with a 2.73 gear only? If that's the case would swapping a W4H0 for the U4P0 advance or delay the shift with steeper gears? I'm thinking that advancing the shift is the correct answer and that's not the way I want to go.

Click to expand...

I can say those two pcm's were used in auto trans Stangs

I can not say I know for certain of why two different pcm's were used

There was a recent thread where Wes gave more info that might
help you but I myself have not worked with auto stuff in the past
so I won't say more for fear of spreading info that is not valid

Grady

 

HISSIN50

"How long does it take to get help in here?

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Nov 29, 1999

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Sep 23, 2007

#11

• Sep 23, 2007

• #11

Grady's right - Wes knows. I actually just asked him this in my last email with him (I have a W4 stock but my spare puter is a U4). Mr Wes knew all the ins and outs of the differences.