Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Kenny on July 24, 2006, 11:20:19 PM

Title: Transmission problem
Post by: Kenny on July 24, 2006, 11:20:19 PM

I've a 4.0lt WJ grand and it appears to have a gearbox problem (59K miles).  I stopped at a set of lights and when trying to drive of it felt as though I was towing an artic.  I switched off the engine after a short while and it was perfect.  But since then I've noticed that every time I switch on my Grand and move off it won't change from 1st to 2nd until around 2.5 - 3K revs.  Now the funny thing is after it eventually changes it's perfect even when you stop at lights and move off a dead start - weird.  What's more weird, it only happens when I move off after I start the GC.

I also tried it out in low ratio and I don't think its changing through the gears.

I've changed the auto oil and cleaned the steel filter - should I put a new one in??

Can anybody help  :(

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Post by: tervueren on July 25, 2006, 07:02:06 AM

Did you re torque the clutch bands when you changed the filter

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Post by: Mike Pavelin on July 25, 2006, 07:32:31 AM

The transmission is going into 'limp' mode. Get it scanned at a dealer and you'll probably find a transmission governor pressure sensor or solenoid fault. The usual belt'n braces fix is to replace both. It's a common problem on 42RE transmissions.

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Post by: Kenny on July 25, 2006, 10:51:03 PM

Thanks Mike

I suppose I'll need to pay the £84 +VAT the dealers charge.  I used the key codes this morning at it came up with "P0720".

Thanks again

Kenny

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Post by: Kenny on July 25, 2006, 10:57:41 PM

Hi tervueren

I'm away on holiday with the Grand so I got one of the local dealerships with a good rep to look at it (not Jeep).  I'm unsure if they would have known about torqing the clutchg band - I'll check tomorrow

Thanks Kenny