Re-gear or higher engine output

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Sep 2, 2016 | 12:49 PM

#31

Jeepin'_Aint_EZ

CF Veteran

Joined: Jan 2012

Posts: 2,208

Likes: 5

From: Ocean County, NJ

Year: 1998

Model: Cherokee

Engine: 4.0L

4.56 is considered the limit for a D30. This is where I stopped and I'm running 35's. The pinion is very small at 4.88's which can lead to issues when wheel'd.

Sep 2, 2016 | 01:00 PM

#32

jon-d

Senior Member

Joined: Mar 2016

Posts: 707

Likes: 20

From: AV Kalifornia

Year: 1996

Model: Grand Cherokee

Engine: 4.0

Quote:

Originally Posted by Jeepin'_Aint_EZ

4.56 is considered the limit for a D30. This is where I stopped and I'm running 35's. The pinion is very small at 4.88's which can lead to issues when wheel'd.

For a factor of safety should I go with 4.27's? that would put me at a 3.62 equivalent.

Sep 2, 2016 | 01:30 PM

#33

Outlaw Star

CF ADMIN

Joined: Sep 2010

Posts: 34,088

Likes: 257

From: Lantana, Fl

Year: 1996

Model: Cherokee (XJ)

Engine: 4.Slow

Quote:

Originally Posted by jon-d

For a factor of safety should I go with 4.27's? that would put me at a 3.62 equivalent.

Quote:

Originally Posted by Jeepin'_Aint_EZ

4.56 is considered the limit for a D30. This is where I stopped and I'm running 35's. The pinion is very small at 4.88's which can lead to issues when wheel'd.

You will be fine with a 4.56. As Jeepin aint EZ stated, the pinion really doesn't become smaller or sacrificial in strength until you get to a 4.88 ratio.