After so much work, tranny issues - JeepForum.com
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post #1 of 7 Old 04-03-2020, 07:48 AM Thread Starter
fishinjeeper
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After so much work, tranny issues

Good mornin all. I have been replacing just about all the joints and bushings in the suspension. My jeep driving amazing now.

I didnt drive the jeep for almost 3 years. The wife and I decided to keep it. I did get a transmission service within the last 2000 miles.

I have started to notice, that if I accelerate moderately to hard, at 10-15 mph, in first gear, there is a thunk kinda like a hit a pot hole. Only one thunk, and only in first gear. It doesnt really "jerk" the jeep around when it does it, it seems like it's more a noise then it pooping out of gear. Right after that thunk, it will shift no problem into second. This is only when I accelerate moderately to hard.

Anyone experience this in a 3 speed auto?


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post #2 of 7 Old 04-03-2020, 07:57 AM
Vinman
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Quote:
Originally Posted by fishinjeeper View Post
Good mornin all. I have been replacing just about all the joints and bushings in the suspension. My jeep driving amazing now.

I didnt drive the jeep for almost 3 years. The wife and I decided to keep it. I did get a transmission service within the last 2000 miles.

I have started to notice, that if I accelerate moderately to hard, at 10-15 mph, in first gear, there is a thunk kinda like a hit a pot hole. Only one thunk, and only in first gear. It doesnt really "jerk" the jeep around when it does it, it seems like it's more a noise then it pooping out of gear. Right after that thunk, it will shift no problem into second. This is only when I accelerate moderately to hard.

Anyone experience this in a 3 speed auto?
Check the slip joint in the driveshafts.
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post #3 of 7 Old 04-03-2020, 08:02 AM Thread Starter
fishinjeeper
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Hmmm. I just replaced both front and rear DS. They are tom woods. How would I go about checking the slip joint?

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post #4 of 7 Old 04-03-2020, 09:24 AM
Vinman
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Originally Posted by fishinjeeper View Post
Hmmm. I just replaced both front and rear DS. They are tom woods. How would I go about checking the slip joint?
Disconnect the end at the diff and make sure the joint move in and out.
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post #5 of 7 Old 04-03-2020, 09:48 AM
mukluk
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My immediate thought is either the transmission mount or a rear suspension bolt isn't sufficiently torqued.
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post #6 of 7 Old 04-03-2020, 03:13 PM Thread Starter
fishinjeeper
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You might be on to something. I dont think this was ever an issue before I did the work to the joints and bushings including removing all the control arms. I'll retorque everything and see if that does the trick

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post #7 of 7 Old 04-04-2020, 04:24 AM
Jonny Jeep
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I had a clunk in the rear just setting off in first gear a few years ago. Couldn't find anything wrong, then one day while having another look at things I grabbed the exhaust pipe and it shifted. I tried shifting the exhaust front to back and it moved about 1/4". The clamp was slightly corroded so I fitted a new one and the clunk stopped.
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