Gear suggestions

jeepman14wheel · 05-17-2005, 08:33 AM

What is the recommended gears for 37" tires? The Jeep that they are going on has a I6 and manual tranny. I was leaning more towards 5.13 vice 4.88 so please help!

**Wheelin98TJ** · 05-17-2005, 12:10 PM

I'd go with 5.13 if possible.

What front axle are you running? If it's a D30, 4.88 will be the lowest you can go.

**Jerry Bransford** · 05-17-2005, 12:14 PM

Be wary of going to 37" tires, few parts on a TJ are up to handling that big of a tire. The front axle, ball joints, steering, etc. are all marginal for that size of tire. I'm running a Dana 44 with Superior Axle axleshafts, a Dana 30 with Warn hardened 4340 chromolly axleshafts, quality Spicer R&P gears, Currie steering kit, etc. and I won't run bigger than 35". My 4.88 gearing and lift height would easily allow me to run 37" tires, but I just ordered another set of 35" MT/R tires on Friday because I knew my TJ just isn't built enough to run 37" tires without excessive wear in the front-end. I considered 37" tires for nearly 3 seconds.

jeepman14wheel · 05-17-2005, 01:41 PM

I have a dana 44 for the front axle and the rear is a ford 8.8.

**Wheelin98TJ** · 05-17-2005, 02:28 PM

Quote:

Originally Posted by jeepman14wheel

I have a dana 44 for the front axle and the rear is a ford 8.8.

I'll stick with my original recommendation then... 5.13

FYI, the 8.8 requires a modified cross shaft pin or you have to notch the ring gear to run gears this low. Just giving you a heads up in case you didn't know this. I found out when we were putting my 8.8 back together with 4.56 gears. The guys at the drivetrain shop I bought the gears from didn't even tell me!

jeepman14wheel · 05-18-2005, 12:36 PM

I did not have to modify the cross shaft on my 8.8 when I went to 4.56 gears.

**Wheelin98TJ** · 05-18-2005, 12:49 PM

Quote:

Originally Posted by jeepman14wheel

I did not have to modify the cross shaft on my 8.8 when I went to 4.56 gears.

How did you get the cross shaft pin in? Didn't the ring gear interfere?

????? · 05-18-2005, 05:01 PM

Since you have the 8.8 the lowest you can go is 5.13. Otherwise I would go to 5.38.

jeepman14wheel · 05-18-2005, 05:20 PM

The ring gear did not get in the way, it was tight but it went right in.

dirtgrip · 05-18-2005, 05:43 PM

Highly recommend Hydro-boost if your driving on the street.It,s hard to stop on 35,s much less 37,s. http://www.vancopbs.com/hydropricing.htm

05-17-2005, 01:41 PM	#4
jeepman14wheel Registered User Join Date: Mar 2004 Location: Temecula, CA Posts: 338 Profile Gallery Classifieds My Jeeps	I have a dana 44 for the front axle and the rear is a ford 8.8. __________________ RE 3.5 lift, 1" BD/MT lift, 33.12.50 MTRs, Teralow, SYE, Detroit locker, Eaton E locker, Dana 44 front, Ford 8.8 rear, warn winch, full roll cage, Fuel cell.

05-18-2005, 12:36 PM	#6
jeepman14wheel Registered User Join Date: Mar 2004 Location: Temecula, CA Posts: 338 Profile Gallery Classifieds My Jeeps	I did not have to modify the cross shaft on my 8.8 when I went to 4.56 gears. __________________ RE 3.5 lift, 1" BD/MT lift, 33.12.50 MTRs, Teralow, SYE, Detroit locker, Eaton E locker, Dana 44 front, Ford 8.8 rear, warn winch, full roll cage, Fuel cell.

05-18-2005, 05:20 PM	#9
jeepman14wheel Registered User Join Date: Mar 2004 Location: Temecula, CA Posts: 338 Profile Gallery Classifieds My Jeeps	The ring gear did not get in the way, it was tight but it went right in. __________________ RE 3.5 lift, 1" BD/MT lift, 33.12.50 MTRs, Teralow, SYE, Detroit locker, Eaton E locker, Dana 44 front, Ford 8.8 rear, warn winch, full roll cage, Fuel cell.

05-18-2005, 05:01 PM	#8
????? Registered User Join Date: May 2005 Posts: 123 Profile Gallery Classifieds My Jeeps	Since you have the 8.8 the lowest you can go is 5.13. Otherwise I would go to 5.38.