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Old 11-29-2009, 02:04 PM
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rough shiftin' after warm up

Just got first jeep-a 99 grand cherokee-very happy with it!!! It does seem to shift kinda rough after it is warmed-when doing in-town driving-was wondering should i be worried about this?-or is it normal for the age of the jeep-thank you!!!
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Old 11-29-2009, 05:00 PM
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Re: rough shiftin' after warm up

Welcome to JG! How many miles do you have? Whens the last time the transmission fluid was changed?

I would start there first.
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Old 11-29-2009, 07:07 PM
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Re: rough shiftin' after warm up

Mine does that too. You just gotta let the tranny warm up. I posted on JU about my tranny about what I should do next with it. What EVER you do, DO NOT FLUSH IT!!! Just change the fluid and filters for what they were saying.
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Old 12-01-2009, 11:05 PM
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Re: rough shiftin' after warm up

if it has over 100k on it DO NOT FLUSH IT AT ALL DO NOT CHANGE THE FILTER DO NOT CHANGE THE TRANS FLUID as new fluid has a detergent in it that cleans the trans and what this will do is clean all the varnish and gum up the valve in the trans mine dose the same thing and i have a 93 with over 208k on it i tow with is and by tow i mean i tow car trailers with it what i do is let it worm up and drive with the od off when i am in town but drive with care don't beat on it and it will last a long time i am shooting of 500k on mine
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Old 12-01-2009, 11:14 PM
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Re: rough shiftin' after warm up

don't all wjs shift a bit harshly?

I mean there's a sweet spot in the pedal right before it shifts that will give you 1 buttery smoothe shift, but that's it, most of the time the tranny in mine would just give a kick so you'd know it shifted.
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Old 12-14-2009, 01:29 PM
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Re: rough shiftin' after warm up

try a trans oil cooler? about 40 bucks at pep boys fairly easy install, and please dont take this wrong erleep but i have a 99 gc and it always shifted hard till i did a trans flush and changed both internal filters, (flat style and screw on style) and now with a combo of the flush and the cooler it shifts like brand new
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Old 12-14-2009, 10:45 PM
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Re: rough shiftin' after warm up

i just changed both filters and gasket in my 01 GC, i'm at 105xxx and i changed it around 102 right after i bought it.

it still shifted fairly hard... occasionally. like maybe once a day it would shift hard when going from 1st to 2nd around 25mph. and every other time it's 3rd to 4th more rarely then 1st to 2nd. it was worse before, but not nearly as bad now. i also drained my tcase

im gonna do my diffs as soon as my step dad gets some spare time at his shop
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Old 12-18-2009, 05:34 PM
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Re: rough shiftin' after warm up

I would suggest doing the front and rear diffs along with tcase fluids and see if that helps. Mine was shifting a bit hard and I did only the rear diff change and I feel the difference already.
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Old 12-30-2009, 11:10 AM
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Re: rough shiftin' after warm up

Quote:
Originally Posted by erleep View Post
if it has over 100k on it DO NOT FLUSH IT AT ALL DO NOT CHANGE THE FILTER DO NOT CHANGE THE TRANS FLUID as new fluid has a detergent in it that cleans the trans and what this will do is clean all the varnish and gum up the valve in the trans mine dose the same thing and i have a 93 with over 208k on it i tow with is and by tow i mean i tow car trailers with it what i do is let it worm up and drive with the od off when i am in town but drive with care don't beat on it and it will last a long time i am shooting of 500k on mine
Your right, but thats not garaunteed in all transmissions though. His transmission may not be that bad to where it would be a bad thing to change the fluid or filters. A lot of high mileage trans should not have the fluid changed because it will just make everything worse that the old fluid actually holds everything together. Although if the trans isn't worn out bad enough than its a good thing to have the fluid changed to help prevent it from getting to that point.
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Old 12-30-2009, 11:14 AM
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Re: rough shiftin' after warm up

Quote:
Originally Posted by dlcjgc99 View Post
Just got first jeep-a 99 grand cherokee-very happy with it!!! It does seem to shift kinda rough after it is warmed-when doing in-town driving-was wondering should i be worried about this?-or is it normal for the age of the jeep-thank you!!!
If you shift the gears manually and it shifts the same then your valve body is bad. By shift manually I mean run the trans from 1-2-d kinda thing. By doing that your telling the trans to apply maximum shift pressure at every shift. If it shifts the same then the valve body would need to be worked on but the clutch packs are still good. Of course make sure that the engine is at the normal operating temp other wise the trans will shift late and hard to help the engine warm up.
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Old 01-12-2010, 08:32 PM
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Re: rough shiftin' after warm up

Thanks for the info!!!!
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