hi i have a 96 bonneville and the trans went out. the junk yard i got a new trans from gave me atrans from a 97 olds. they looked it up in there book and said its a match ,but i want to make sure. they both are 4t60e but im not sure if the new one is the same gear ratio as mine 3.06 .
thanks for any help
yomamas

Give me all the #'* off the metal tag on the side of the trans. I might be able to look it up for you in the manual. If no tag, you may have to go back and look at the RPO sticker in the trunk of the Olds. You will either have the RPO FW2(3.06) or F17(2.84).

ok the numbers off the olds tranny are top to bottom 616asw w1z0b than stamped in are 242 4b 01. on my bonne they are616bxw w276f than stamped 356 4b 03.
thanks for ttying to help
yomamas

Ok, got your info, looked it up in my manual. According to the broadcast codes you gave me

Olds Tranny
6ASW=2.84 Ratio

Your Tranny
6BXW=3.06 Ratio

BTW, the first digit in the broadcast code designates the year of the tranny. 6ASW=1996. If the Olds trans did come out of 1997, the code would read 7ASW. So, either the transmission you got was swapped out, or your seller was mistaken for the year it came out of.

Considering these trans are pretty much the same. Here'* what you need to do.
Swap differentials, gear sprockets and chain. This will put you back to the original 3.06 drive with no problems. Let me know if you need any help with this.

ok i took the trans back but they didnt have a trans with the 6bxw code. is there another code such as 6acw work or will just 6bxw will work
thanks for helping
yomamas

ALSO it should be noted that you want to get a trans with the Same Ratio and FROM THE SAME YEAR....there are wiring differences from year to year

Yea, he'* right. Though you can rewire these, but its a PITA. Stick with the same model and you won't have any worries.

they have a cpl from 96 bonnevilles but the code on the tag is different.thats why i wanted to know if the 6BXW is the only one that is the right gear ratio or are there different codes that are 3.06 also.
thanks
yomamas

There are different codes for different ratio'*, but are assigned to different bodys, ie H body, G body etc.