TJ L98 SBC Gearing Suggestions -
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Unread 04-22-2013, 08:24 PM   #1
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Join Date: Apr 2013
Location: Edmonton, AB
Posts: 8
TJ L98 SBC Gearing Suggestions

New to this forum...
I have a 1997 TJ project which is 99% done. I am pondering what gear ratio I should go with in the diffs. Currently I have 3.07s but thinking about 4.10s.
Currently the 3.07s handle everything...but think I am losing a lot of bottom end due to the gearing

This Rig is going to be used for street and mild wheeling...


-L98 SBC from 1991 vette (275ish hp)
- AX15 (till it blows up)
- NV231
- Dana 30 - 35
- 6" Long arm lift
- 35" tires

95harley is offline   Reply With Quote
Unread 04-22-2013, 10:02 PM   #2
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2002 TJ Wrangler 
Join Date: Sep 2009
Location: FT. BRAGG
Posts: 388
the 4.10's would definitely be a lot better, even with the v8. But regearing the dana 35 while running 35's and a v8 is a waste of money in my opinion. 8.8 or dana 44 with 4.10's would be nice. I've found that 4.56's are a nice combination with 35's and street driving.
02 black sahara- 35" km2's, savvy 4", 4.88's, Detroit True Trac 44 rear, Aussie 30 front, Awesome Stereo.
bigorangeyj is offline   Reply With Quote
Unread 04-23-2013, 12:57 PM   #3
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1997 ZJ 
Join Date: Dec 2006
Location: , Pennsylvania
Posts: 19,795
the d35 will likely blow well before the ax15, especially with 35's.
8.8's can be easily found with 4.10's and lsd or open. i'd seriously suggest you go that route. even a whooped on dodge 5.2 is more than the d35 can handle, and it's only 235hp at best in good condition.

the chevy motors like to run slightly lower rpm than the dodge and amc equivalents. so 4.10 or 4.56 would probably be good for your 35's. i can't imagine how much driving around on 35's with 3.07's sucks, it was annoying with the 5.2 and 3.73's for me. 5th was practically useless.
'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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Unread 04-24-2013, 08:52 AM   #4
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1995 YJ Wrangler 
Join Date: Oct 2011
Posts: 300
I have a sbc with 4.10 gears and 35s, I don't think I would want 4.56 because I have plenty of power in 5th gear to pull a hill
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Unread 04-24-2013, 05:56 PM   #5
1997 TJ Wrangler 
Join Date: May 2012
Location: Sandy, UT
Posts: 280
I have 4.56's and 37's, had 35's a 5.3 and an AX15. 4.56 is the way to go. Plenty of bottom end and enough speed too without over revving the motor. I turn about 2600 rpm at 75-80 mph
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Unread 04-24-2013, 10:52 PM   #6
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Location: Edmonton, AB
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thanks for all the input...Shopping for some new axles to swap in.
95harley is offline   Reply With Quote

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