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Pontiac Bonneville Transmisssion

45 messages,  Last post on Dec 07, 2009 at 1:59 PM

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What is this discussion about? Pontiac Bonneville, Transmission, Sedan

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#32 of 45 Re: transmission issue? [kaylee01] by foru2nv Nov 13, 2008 (8:21 am)
Replying to: kaylee01 (Feb 23, 2008 5:08 pm) I had the same problem with my 94 Bonneville SE (currently with 279,000 miles) about a year ago. I didn't go on the highway much, but every time I did I'd have to shut the motor off for a few minutes to reset the computer after the car shifted into the passing gear. It didn't do it that much so I just dealt with the problem, but now it will not go into overdrive at all. I went from 400 to 475 miles on an 18gal fuel tank (approx. 26.4MPG), down to 225 to 275 miles (15MPG) just because this car runs in the passing gear all the time. At 72-73MPH it runs at 3200-3300RPM. It should be at about 2100RPM in overdrive. With gas prices as high as they are, I will save myself more money than I will know what to do with... lol I have been talking to a few people and every one of them told me it sounds like the "transmission Control Solenoid". There are two of them, (the TTC lock-up and shift solenoid 1st-2nd and 3rd-4th & just a regular Solenoid) in my vehicle, and thankfully they are both external meaning they are on the outside of the transmission, and not inside that trans. pan. The Torque converter clutch lock-up (TCC Solenoid) is the one that works the overdrive gear I think, but I am not 100% sure. I am going to be changing both of these just to be safe. AutoZone has them listed at 28.99 and 26.99, one is in stock, and the other is a special order and will take 1-3 days to get. If you are still trying to get information about your problem, just let me know by e-mail, and I will let you know if by changing these two solenoids, it corrected the problem. My email is josephbelles (at) g mail (dot) com You can also see these parts by going to this website. (http://www.autozone.com/N,11200623/shopping/partTypeResultSet.htm) Have a Great Day!
#33 of 45 Car won't go over 60 mph after Trans pan gasket changed. by CarDatax Nov 23, 2008 (9:02 pm)
I have a 1994 Pontiac Bonneville. It roared like hell up to 120 mph before I took it to Big O Tires to have the pan gasket changed because it was leaking. Once I got the car back now it won't go over 60 mph. Any suggestions? Any and all advise would be greatly appreciated!
#34 of 45 transmission issue by 1994usedbon Nov 27, 2008 (8:02 pm)
Hi I am new to this group, I find it great that you can come here and , with alittle help people can see the light at the end of the tunnel as they say. But i to have a 1994 bonneville, 220k Changed fuel pump, fuel filter , spark plug and wires and i think the coils were changed before i bought it, but my problem is overdrive, have done alot of reading , but dont seem to see an answer , gets to a certain speed and starts to feel like trany problem then if you put your foot into it it stops, or if you let off, has anyone found a fix for this?? Replies to this message: imidazol97 (Nov 28, 2008 8:28 am) 1994usedbon (Nov 29, 2008 2:33 pm)
#35 of 45 Re: transmission issue [1994usedbon] by imidazol97 Nov 28, 2008 (8:28 am)
Replying to: 1994usedbon (Nov 27, 2008 8:02 pm) > then if you put your foot into it it stops, or if you let off,   Can you describe more about what and when it's doing when you say it stops or if you let off? Replies to this message: 1994usedbon (Nov 29, 2008 2:33 pm)
#36 of 45 Re: transmission issue [imidazol97] by 1994usedbon Nov 29, 2008 (2:33 pm)
Replying to: imidazol97 (Nov 28, 2008 8:28 am) The ''buckin'' like its trying to shift into or out of overdrive....   thanks for the reply.
#37 of 45 Transmission Issue by scscars Nov 30, 2008 (5:06 pm)
I just resolved the "bucking" problem with the 4T65-E transmission on my 2002 Bonneville with 135,000 miles. This problem has multiple causes, but the main one is jammed shift and EPC solenoids. The jamming comes from particulates accumulating in the solenoids and impeding their functions. The particulates come from the overdrive and 3rd gear clutches burning out. Also, the bucking and, in my case, jolting, also came from wear in the 2nd gear spline, drive chain, boost valve, and channel plate sleeve.   I asked the transmission specialist where I took the car if more frequent maintenance would have helped, and he said that while I could have gotten a few more miles out of the tranny by more frequent fluid changes ( I was changing at every 30,000 miles), these transmissions start failing at between 125,000 and 175,000 miles. Also, to completely repair the transmission is not cheap, at least not in my particular case, but it was less expensive than the down payment on a new car, and since financing a new car is next to impossible right now, and that I'm not ready to part with my Bonneville, I look at it as a new lease on life.   1994usedbon, may your problem be less expensive and less extensive. The 4T65-E transmission didn't come along until 1997, so your experience may be much different. Good luck!
#38 of 45 hi my name is jamie by jgrov Apr 10, 2009 (10:46 am)
i have a 1999 boneville ssei and every time i accelerate it jerks in every gear is there something i can do and it also jerks when i shift to neutral what could be the problem?
#39 of 45 2003 Transmission shifting hard through all gears. by pgfalcon Nov 14, 2009 (9:34 pm)
I have 2003 Bonneville. It has about 130,000 miles on it and I do not know if the transmission fluid has ever been changed. The fluid levels are at the right level. Recently the has incurred a slight noticable lunge when shifting through the gears. I have been reading in the forum and curious if it is the Transmission Valve Body or the Transmission Torque Converter Solenoid. I am also going to change the Transmission Fluid. Are either of the parts external or are the inside the Transmission. Replies to this message: imidazol97 (Nov 15, 2009 3:58 am) imidazol97 (Nov 16, 2009 6:42 am) pgfalcon (Nov 16, 2009 4:58 pm) scscars (Nov 15, 2009 3:43 pm)
#40 of 45 Re: 2003 Transmission shifting hard through all gears. [pgfalcon] by imidazol97 Nov 15, 2009 (3:58 am)
Replying to: pgfalcon (Nov 14, 2009 9:34 pm) How's the motor running? Replies to this message: imidazol97 (Nov 16, 2009 6:42 am) pgfalcon (Nov 16, 2009 4:58 pm)
#41 of 45 Re: 2003 Transmission shifting hard through all gears. [pgfalcon] by scscars Nov 15, 2009 (3:43 pm)
Replying to: pgfalcon (Nov 14, 2009 9:34 pm) The torque converter solenoid is internal. Of that, I'm certain. I'm not sure about the transmission valve body. After having multiple problems with the 4T-65E transmission on my '02 Bonneville last year, it's likely that major issues concerning jolting, lunging, or jerking when moving between gears is going to be caused by an internal component. Good luck, and hope your problem turns out to be an inexpensive one.

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