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99 Tacoma prerunner transmission question?

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Old 05-14-2008, 09:58 AM   #1
Getsch [OP] Getsch is offline
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99 Tacoma prerunner transmission question?

I recently got a 99 tacoma prerunner xtra cab 2.7 and it has a small bug that seems to be in the transmission and I am wondering of anyone can help me diagnose it. When sitting in drive at a stop the transmission seems to keep in gear so that the engine seems to be fighting the brakes, but if you let of the brakes slowly and role an inch and stop again it will unload and be fine.

Any help?
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Old 05-14-2008, 10:04 AM   #2
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There is an issue with the 05+ where there is a clunk when coming to a stop. It has something to do with the grease and the drive shaft connection. You might be having a similar problem. I'm sure someone here knows the actual problem I'm speaking of.
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Old 05-14-2008, 10:25 AM   #3
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"Chris 4x4" says:The leaf springs on the Tacomas are on the soft side of the spectrum. That being said ( please follow me on this) When power is applied to the tires, the torque moves your rear axel up a little bit causing the springs to twist like an "S" just not as dramatic. When you are at crusing speed the springs relax into their normal state. Now, when comming to a stop ( with an auto and below about 15 m.p.h. ) your engine is still trying to turn the tires and the differential is moveing up a little bit twisting the springs. When you are stopped and let off the brakes or ease off them, the springs unload and you hear the "thump". A small amount a axel wrap is not a bad thing and is normal on most Tacomas. It can be tammed with the addition of an AAL. Blocks will amplify the problem and as they move the fulcrume point where the axel mounts on the springs, thus leading to premature wear on the springs. In many cases if the block is poorly made, they can shatter, crack, or whatever and cause a big problem.<<<this post in another forum from a very WISE Man on technical stuff-"Chris 4x4"..........this is your answer-no cause for great concearn
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Old 05-14-2008, 10:30 AM   #4
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there is a part of the drivetrain that allows for a very slight change in length due to the suspension travel. As the truck slows quickly, the rear goes up. As you accelerate, the rear goes down. This change in height is what causes the change in effective driveshaft length. The part that allows the change in length(and causes the clunking) might have a stiff grease causing the problem.

True, a change in suspension could also help with the issue.
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Old 05-14-2008, 11:54 AM   #5
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Quote:
Originally Posted by Getsch View Post
I recently got a 99 tacoma prerunner xtra cab 2.7 and it has a small bug that seems to be in the transmission and I am wondering of anyone can help me diagnose it. When sitting in drive at a stop the transmission seems to keep in gear so that the engine seems to be fighting the brakes, but if you let of the brakes slowly and role an inch and stop again it will unload and be fine.

Any help?
Kinda off topic, but I greased the slip yoke bushing on my '99 Tacoma 4X4 with brand X. Started clunkin while taking off and stoping. Took it to the dealer and they said they repacked it with their Toyota grease and it did help. Six months later the bushing needed replacing anyway for excessive play. All I'm saying grease or defective my problems were with the slip yoke bushing. This caused a cluncking noise and a small surge type feeling upon occasion.
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