My Bonneville has 175,000 miles on it, and the original transmission was starting to get a little sloppy on the shifts. As a result, the transmission would detect the slow shifts and boost pressure up to 100%, which would result in extremely harsh shifts and the occasional whine from the tranny pump (sounded like a power steering pump low on fluid).
Last weekend I installed an accumlator that BillBoost rebuilt with a shift kit (cost me $50), and did a pan drop fluid and filter change. Not only are the shifts nice and crisp now, after 4 days I can report there are no signs of the harsh shift problem I had been experiencing.
Some added info if you are interested:
- easiest install I have ever done. Took an hour, but that was only because I took a lot of time to clean the pan, the gasket and the gasket surfaces, and do an engine oil change at the same time. I probably could have done it in 15 minutes if I had to.
- the pan bolts take a 10 mm socket, and are torqued to 120 in-lbs (10 ft-lbs)
- if you have a gasket with ribs and feels like a metal core, so long as it is not obviously damaged it is reusable. Just clean it up.
- the accumulator bolts take an 8 mm socket, and are torqued to 106 in-lbs
- it took 8.5 quarts to bring the fluid up to the proper level after the change (2 gallon jugs plus 1/2 a quart)
- tranny fluid level is checked at full operating temperature, engine running, tranny in park
- the shift kit BillBoost installed gives a nice crisp shift, but no signs of harshness whatsoever.
This $50 rebuilt accumulator from BillBoost saved me the cost of rebuilding my transmission. At least for a while. She may crap out on me one of these days, but the life has certainly been extended. Even if you don't have the harsh shift problem I had, I would stongly recommend one of these shift kits to anyone. You will love the improvement in how your tranny shifts.