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what tranny do i have?

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Old 09-25-2003, 02:34 PM
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thats why i asked i didnt see the D...what is my final drive ratio then??????? or do i hve to go look at the rpo codes?


Originally Posted by DeathRat
Wrong guys......All the 92'* came with the M13 - 4T60-E. They all used this transaxle until 97. The ONLY thing different between them was the Final Drive Ratio (1992 > M13 > 3.06R / 2.97R / 2.84R). Now the Series II'*, well that'* a different story.
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Old 09-25-2003, 05:16 PM
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Interesting. The M13 Transmission came in two different types.

RPO Trans Name First Second Third Fourth

HM 325-4L 2.740 1.570 1.000 0.670
M10
JF403-E 3.027 1.619 1.000 0.694
M13
4T60-E HD 2.921 1.568 1.000 0.705
M13
4T60-E 2.921 1.568 1.000 0.705
M15
4T65E 2.921 1.568 1.000 0.705
M45 Aisin-AW AF33 4.685 2.942 1.923 1.301
M57
A245-E 3.639 2.006 1.295 0.892
M76
4T65E 2.921 1.568 1.000 0.705
MD7
4T65E 2.921 1.568 1.000 0.705
ME8
4T60 2.921 1.568 1.000 0.705
ME9
440-T4/F7 2.921 1.568 1.000 0.705
MH1
4T80-E 2.960 1.626 1.000 0.681
MN3
4T65E 2.921 1.568 1.000 0.705
MN4
4T40/45-E 2.960 1.626 1.000 0.681
MN5
4T45-E 2.960 1.626 1.000 0.681
MN7
4T65E HD 2.921 1.568 1.000 0.705
MS7
A240-E 3.639 2.006 1.295 0.892
MU4 A246-E 4.005 2.208 1.425 0.981
MU5 U341-F 2.847 1.552 1.000 0.700
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Old 09-25-2003, 10:51 PM
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and this tells me what?
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Old 09-25-2003, 10:55 PM
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Its the RPO code for each tranny, followed by the tranny name, followed by gear ratios in each gear on all Bonnevilles.
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Old 09-26-2003, 10:04 AM
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This is why I thought I had a heavy duty trans:

1991? - 1993? - 4T60-E HD - Same as 4T60-E except with a few heavy duty
parts (mainly final drive gearset) for supercharged 3.8l V-6 application.
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Old 09-26-2003, 11:38 AM
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That is correct, Sir.
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Old 09-26-2003, 12:10 PM
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Originally Posted by DeathRat
Originally Posted by ssesc93
So does my 93 have the 4T60E-HD?
NO!
Then whats this?
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Old 09-26-2003, 12:27 PM
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Point-counterpoint, kind of like debate class.
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Old 09-26-2003, 01:45 PM
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A SC SE, SLE, or SSE will also have the HD.
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Old 09-26-2003, 06:38 PM
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Originally Posted by jr's3800
Originally Posted by CraZyDriVer868
and this tells me what?
That there is a heavy duty version of the M13....4T60-E... I don't think there is any diffrence in the clutches and bands... The only diffrence I know of is the gear set is etronger to handle the abuse of the SC'd 3800'*... 260 ft lbs - 280 ft lbs... Also this transmission was used behind the caddy 4.9L V8...

If there is no heavy duty trans, than I need to send my 4T60-E to Bill and see how long it takes him to destroy it...

David, I'll bet my money that you have a 2.97 ration in your trans... RPO F79
Like I said earlier! There was no HD version used in a Bonneville! Now the Caddy is a different story mind you.
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