Is 4.10 gears deep enough? -
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Go Back > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Is 4.10 gears deep enough?

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Unread 04-05-2010, 09:37 PM   #1
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1987 YJ Wrangler 
Join Date: Mar 2010
Location: barnegat
Posts: 38
Is 4.10 gears deep enough?

I have a 87 Wrangler with a 4.2 block with 15,000 miles on it, remanufactured 4.0 head 0 miles on it, header , 32/36 weber, msd ignition with team rush upgrade and msd wires, and dynomax catback. I was wondering if this is going to be enough to drive highway speeds without the pedal to the floor? I have not driven it since these upgrades being that I am finishing college and has been a slow build for the past three years also it has 35 inch tires and a ford 8.8 rear end with winch as the only added extra weight. Do you think this will be enough or should I just regear while I am waiting to graduate in May. I go to school in Newark, NJ, so instead of having it stoling its been sitting for a few years while I slowly upgrade but can't wait to drive it once I am done with school and get the hell out of the city. Any suggestions or should I just rejet the carb. A motor swap is out of the question so looking for cheaper alternatives.

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Unread 04-05-2010, 09:46 PM   #2
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1995 YJ Wrangler 
Join Date: Feb 2009
Location: Los Angeles. California. United States.
Posts: 4,910
Wow, 35'S with 4:10 gears. Wouldn't fly with squirrel engine, that much I know.
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Unread 04-05-2010, 10:02 PM   #3
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1999 TJ Wrangler 
Join Date: Oct 2007
Location: Colorado Springs, Colorado
Posts: 4,632
It would be do-able, but you'll want 4.88's
2 Hands Working Do More Than 1000 Hands Praying

94 YJ Build

99 TJ Build
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Unread 04-05-2010, 10:13 PM   #4
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2000 XJ Cherokee 
Join Date: Jun 2008
Location: , MD
Posts: 166
Drive it and you'll find out for yourself.
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Unread 04-05-2010, 11:03 PM   #5
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1993 YJ Wrangler 
Join Date: May 2005
Location: Colchester, VT
Posts: 940
well my 4.0l with 4.10's and 35's doesn't like highway speeds much just not regearing yet.... I don't do enough highway driving with it to make it worth it for me yet but probably will happen within the next year
1993 Jeep Wrangler
4.0L Tom Woods rear HD shaft
D30 w/yukon alloys, lock right, jb4x4 bracket, Rusty's HD tie rod 8.8w/ LSD,SOA xj rear 100" wheelbase, homemade greasable boomerang shackles, SS braided lines, 1" prothane body lift, 35" TrXus M/T, smitty built XRC.
lots of gen right armor and rear stinger.
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Unread 04-06-2010, 12:32 AM   #6
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1994 YJ Wrangler 
Join Date: Jan 2009
Location: NW FL
Posts: 112
I honestly don't know about 35's, but 33's with my 4.10's and 4.0L has been great.
Roads...? Where we're going.. we don't need roads.
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