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Discussion Starter · #1 ·
I'm sorry about my stupid radiator question but im a rookie.. i have another one. I have a 4.2 6 cyl 1987 YJ with Dana 35 axles. it has a homemade lift kit on it. I am wanting to get 33 12.50 Mud dawg's i know they will fit but will this bog down my engine, take away power, or anything else like that?
Thank you in advance.
 

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do you know what gears you have? i don't know what gears came with the 4.2. if you have 3.73's then i think you'll be ok. but since you have a dana 35 just go easy on the gas pedal (i.e. just don't do anything stupid like dump the clutch or bounce on an obstacle off road.)
 

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Discussion Starter · #3 ·
reply with gears

my gears should be 3.55 because it is a 4.2 6cyl automatic. if that helps
 

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Id go to the jeep stealership with ur vin and they can print up a birth cert. that tells u everthing about the jeep, including axle ratios. I had to do this cause my 90 had 4 dif. options and when i counted axle revs : trire revs i got 4:10 but the stealership said that I have 3:73. The autos came with only 1 option, dont remember what it was though. 4:10 i think.
 

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My 87 YJ with an auto has 3:06 gears. You will be able to drive it with 33's, but you will definately notice a power loss. Ideally you will want 4:10' with the 33's.
 
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