Anyone kno nething about the 4 speed auto? What year start useing? bolt into 3 speed?

jeepcj7 · 06-18-2004, 02:50 PM

I was just wondering if anyone knows what year they started using the 4 speed transmission in a TJ, and does it have overdrive? Whats the final drive? AND MOST important will it bolt right up to my 1997 sahara 3 speed auto? What is the tranny modle number, and what other vehicles used the same trans? THANX IN ADVANCE....PLEASE advise.

BaaBaa · 06-18-2004, 02:59 PM

Quote:

Originally Posted by jeepcj7

I was just wondering if anyone knows what year they started using the 4 speed transmission in a TJ, and does it have overdrive? Whats the final drive? AND MOST important will it bolt right up to my 1997 sahara 3 speed auto? What is the tranny modle number, and what other vehicles used the same trans? THANX IN ADVANCE....PLEASE advise.

I had my tranny rebuilt last week... asked some of the same questions to the mechanic and got these responses:

In early 90's, Jeeps with 3-spd auto had a bolt-on kit available that put in an overdrive gear. The guy could not find whether this was still available, and believed he "might have heard" that it was never a very good solution. He explained that the 4 speed Jeep's now come with is really a 3-spd overdrive (I'm not sure exactly what that means.)

Sorry this isn't more helpful... I had trouble getting much info in the forum about the auto tranny's, so I hope you have better luck!

n4phth4 · 06-18-2004, 03:17 PM

Hmm. I am staring at the TJ 2004 service manual, page 21-73.

The 4spd tranny is the 42RLE. Dunno what year DC started using it, or whether it will bolt right into your ride. Yes, it has overdrive. The ratios are:

1st - 2.84:1
2nd - 1.57:1
3rd - 1:1
overdrive: 0.69:1
reverse: 2.21:1

blupupher · 06-18-2004, 04:38 PM

Started in 2003, would probably bolt up, but you need a computer to control it.

jeepcj7 · 06-23-2004, 09:11 AM

thanx for the help, any one know the price of one of these "42RLE"

jeepcj7 · 06-23-2004, 09:13 AM

also neone kno about the "bolt on overdrive", or hear on it

n4phth4 · 06-23-2004, 09:33 AM

Quote:

Originally Posted by jeepcj7

thanx for the help, any one know the price of one of these "42RLE"

Ask your favorite 4x4 shop representative, or your favorite dealer.

Hmmm.. a quick google reveals this on allpar.com about the 42RLE:

"The transmission used in the Jeep Liberty and six-cylinder LX cars. It is essentially the four-speed car/minivan transmission known in earlier years as the A-604, adapted for rear wheel drive use."

You should try out google. I'm sure you will find the answers to your questions. ;-)

06-23-2004, 09:11 AM	#5
jeepcj7 Registered User Join Date: Jan 2003 Location: connecticut Posts: 167 Profile Gallery Classifieds My Jeeps	thanx for the help, any one know the price of one of these "42RLE" __________________ [URL="http://jeepforum.com/forum/showthread.php?t=259995"]*FOR SALE*1997 Jeep Wrangler Sahara- LIFTED- 33x10.5x15- bed liner interior w/ carpet- AUTOMATIC[/URL]

06-23-2004, 09:13 AM	#6
jeepcj7 Registered User Join Date: Jan 2003 Location: connecticut Posts: 167 Profile Gallery Classifieds My Jeeps	also neone kno about the "bolt on overdrive", or hear on it __________________ [URL="http://jeepforum.com/forum/showthread.php?t=259995"]*FOR SALE*1997 Jeep Wrangler Sahara- LIFTED- 33x10.5x15- bed liner interior w/ carpet- AUTOMATIC[/URL]

06-18-2004, 03:17 PM	#3
n4phth4 Registered User Join Date: Mar 2004 Location: Jersey Posts: 182 Profile Gallery Classifieds My Jeeps	Hmm. I am staring at the TJ 2004 service manual, page 21-73. The 4spd tranny is the 42RLE. Dunno what year DC started using it, or whether it will bolt right into your ride. Yes, it has overdrive. The ratios are: 1st - 2.84:1 2nd - 1.57:1 3rd - 1:1 overdrive: 0.69:1 reverse: 2.21:1

06-18-2004, 04:38 PM	#4
blupupher Registered User Join Date: Feb 2003 Location: this one Posts: 1,360 Profile Gallery Classifieds My Jeeps	Started in 2003, would probably bolt up, but you need a computer to control it.