Just got this car and it has 78k miles. Guy told me that it doesn't have forward. Confirmed this by seeing that the forward band is broken. I did find some other interesting things inside..... some of the teeth on the dual planetary gearset scarred and the sun gear has chipped teeth.... ALSO.... the final drive... one of the planet gears has a chipped tooth on it.

Now the BIG mystery that's been scramblnig my mind.... is there supposed to be any wiggle or play in the final drive ring gear? Because there is with this unit. ALSO also... what transmissions will interchange with this car or rather, what would the final drive RPO code be? I know my 2005 Bonneville is F83 so I am wondering what the code would be for this one.

Please any and all input is greatly appreciated.

Thank you

Out of curiosity, does this CXL have the Northstar? Their 4T80-E transmissions tend to blow up around 80k miles, from what I've seen.

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'02 Pontiac Bonneville SE 108,539 miles, N/A, SSEi exhaust system, boat roller mount. Gone, but not forgotten.
'13 Buick Regal GS 102k miles, 270 hp, 295 lb/ft, ZZP intake.
(yes, there is a story behind my avatar.)

No it is NOT the N* and I am certainly glad for it. It's the 3.8 L and I think the last year they were used.

http://www.gmtuners.com/transmission/ only goes up to 2006 for some reason

Looking around on https://www.car-part.com it looks like they interchange with nothing, only 2007 Lucerne CXL 3.8. The ones I saw had the PA tag, which means 2.86 ratio.

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Andrew - owner/operator of Bonnevilles Unlimited

2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
1997 Corvette | 55k | Silver Metallic | Z06 wheels | Date-night Hauler/Parts runner
2014 Town & Country Limited | Cashmere Pearl | 95k | Family Hauler
2002 Ram 1500 Quad Cab Sport | Black| 260k | Official Bonneville Hauler

If its a 2.86 that means it has a 35:35 gearset. So if you find a 4t65-e of the same year with a 3.05 or 3.29 you *may* be able to swap your differential in and be good to go. The 2 variables are external mounting provisions, which you can easily check, and any internal wiring differences, which you could compare resistances pin to pin at the connector.

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95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy (RIP)
02 Jag X-type
03 BMW M5
05 Chevy Cobalt LS
07 Infiniti G35s 6MT (Sold)
07 Ducati Monster S2R 800 with DS1000 swap
83 Yamaha IT175K
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.