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Unread 06-18-2013, 08:42 PM   #1
scross1220
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Transmission issues after stroker build

I have a 2002 JGC 4.0l that I strokered to 4.6l. After the build and testing during engine breakin I noticed that when driving the when the trasmission is shifting from 3rd to 4th that the shifting is not always smooth and sometimes shifts quikly with at little reving. This is more aparent when I and driving and let off the gas during the time the transission shifts from 3rd to 4th gear. I did not have this befor I strokered it but not it happens a lot. There is no jerking but the best way to describe it is like it misses the shift. What am I dealing with?

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If you're not fixing it, you're not driving a Jeep.

---My Chariots past and present---

1993 Jeep Grand Cherokee 4.0L 196,000 miles. Sold
1998 Jeep Grand Cherokee 4.0L 161,000 miles. Sold
2001 Jeep Grand Cherokee 4.0L 147,000 miles. Own
2002 Jeep Grand Cherokee 4.6L Stroker 122,000 miles. Own
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Unread 06-18-2013, 09:15 PM   #2
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Quote:
Originally Posted by scross1220 View Post
I have a 2002 JGC 4.0l that I strokered to 4.6l. After the build and testing during engine breakin I noticed that when driving the when the trasmission is shifting from 3rd to 4th that the shifting is not always smooth and sometimes shifts quikly with at little reving. This is more aparent when I and driving and let off the gas during the time the transission shifts from 3rd to 4th gear. I did not have this befor I strokered it but not it happens a lot. There is no jerking but the best way to describe it is like it misses the shift.

What am I dealing with?

Sounds like you're dealing with a junky 42re tranny that barely held up to the stock 4.0 power to begin with
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Unread 06-18-2013, 09:29 PM   #3
chrism1367
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Mine does the same thing on the 3-4 shift, doesnt take long to shift but a little harder than other gears, it is not a smooth shift. I'm guessing clutch pack or something worn. Was like that when I bought it. After doing complete filter and fluid change it got a little smoother. Hasn't gotten any worse though since I've had it which is good.
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Unread 06-18-2013, 09:41 PM   #4
scross1220
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Ah crap sound like mine. I didn't have the issue till the the stroker build but I beginning to think the new engine may be too much for it. Did a fluid change 8k ago but the filter has not been changed. Are there any adjustments Like the shift bands that could help?
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If you're not fixing it, you're not driving a Jeep.

---My Chariots past and present---

1993 Jeep Grand Cherokee 4.0L 196,000 miles. Sold
1998 Jeep Grand Cherokee 4.0L 161,000 miles. Sold
2001 Jeep Grand Cherokee 4.0L 147,000 miles. Own
2002 Jeep Grand Cherokee 4.6L Stroker 122,000 miles. Own
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Unread 06-18-2013, 09:55 PM   #5
scross1220
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Its definately a slip now that I have read some threads. I have to listen to see if its slipping from 2nd to 3rd or 3rd to 4th.
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If you're not fixing it, you're not driving a Jeep.

---My Chariots past and present---

1993 Jeep Grand Cherokee 4.0L 196,000 miles. Sold
1998 Jeep Grand Cherokee 4.0L 161,000 miles. Sold
2001 Jeep Grand Cherokee 4.0L 147,000 miles. Own
2002 Jeep Grand Cherokee 4.6L Stroker 122,000 miles. Own
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Unread 06-19-2013, 09:35 AM   #6
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I think there is some band adjusting you can do to it with a filter/fluid R&R. I've yet to crack into my tranny - scared of it...
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Unread 06-19-2013, 10:10 AM   #7
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I think there is some adjustment you can do but I'm afraid of turning my trans into a big paperweight
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Unread 06-19-2013, 10:35 AM   #8
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Originally Posted by scross1220 View Post
Ah crap sound like mine. I didn't have the issue till the the stroker build but I beginning to think the new engine may be too much for it. Did a fluid change 8k ago but the filter has not been changed. Are there any adjustments Like the shift bands that could help?
Before you get into that hairy process, try adjusting the throttle kickdown cable. It's the only adjustable cable of the three connected to the throttle body. Try pulling that out a couple notches at a time to increase line pressure inside the transmission and get firmer, quicker shifts. That's also much better for your transmission because the clutches spend less time slipping, so they wear less. The only reason it shifts soft from the factory is that most consumers prefer a gentle, comfortable shift.
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Unread 06-19-2013, 01:04 PM   #9
scross1220
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That was it. I adjusted the throttle kickdown cable 5 clicks and I was fine. There was too much slack in the cable. Thanks for your help.
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If you're not fixing it, you're not driving a Jeep.

---My Chariots past and present---

1993 Jeep Grand Cherokee 4.0L 196,000 miles. Sold
1998 Jeep Grand Cherokee 4.0L 161,000 miles. Sold
2001 Jeep Grand Cherokee 4.0L 147,000 miles. Own
2002 Jeep Grand Cherokee 4.6L Stroker 122,000 miles. Own
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Unread 06-19-2013, 01:19 PM   #10
chrism1367
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That was it. I adjusted the throttle kickdown cable 5 clicks and I was fine. There was too much slack in the cable. Thanks for your help.
I def have to try that. Simple as it sounds I hope
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Unread 06-19-2013, 03:52 PM   #11
scross1220
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Thank you again Jonathan for that tip it worked like a charm.
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l_---l_l__l---[o]llllll[o]
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If you're not fixing it, you're not driving a Jeep.

---My Chariots past and present---

1993 Jeep Grand Cherokee 4.0L 196,000 miles. Sold
1998 Jeep Grand Cherokee 4.0L 161,000 miles. Sold
2001 Jeep Grand Cherokee 4.0L 147,000 miles. Own
2002 Jeep Grand Cherokee 4.6L Stroker 122,000 miles. Own
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Unread 06-20-2013, 01:29 PM   #12
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I have a question for you all. When I was having the issue with my transmission not shifting correctly I made a call to AAMCO and asked if they could adjust the bands in my tranny. The machinic said to me that there were no adjustments on my transmission and that they were auto adjusting. I am not an expert but I know that it was a lot of bull. The problem ended up being a TV kickdown cable adjustment as mentioned by jonathan but what I like to know is why the machanic told me there was not band adjustments on transmission? Any thoughts?
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/__l_l_,\____\,___
l_---l_l__l---[o]llllll[o]
_.(o)_)__(o)_)--o-)_)


If you're not fixing it, you're not driving a Jeep.

---My Chariots past and present---

1993 Jeep Grand Cherokee 4.0L 196,000 miles. Sold
1998 Jeep Grand Cherokee 4.0L 161,000 miles. Sold
2001 Jeep Grand Cherokee 4.0L 147,000 miles. Own
2002 Jeep Grand Cherokee 4.6L Stroker 122,000 miles. Own
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