I have 79 Supercab 4x4 with new 520 hp 460 with new c-6 tranny. Have stock gears now I am pretty sure they are 4:10s. Does not have power when driving I was thinking it would have. Have Detroit locker ready to go in rear wondering what gears would give me the launch I am looking for. Maybe 5:13 not sure. Any help would be greatly appreciated and thank you in advance.

 

5.29.........

 

This is your opinion or do you have reason. Not trying to be a jerk just want to make an educated decision. Thanks for answer at least.

 

5.38!


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Sold! to the highest bidder!

edit: sorry, had to... donno why I'm sure there are gear ratio to tire size to engine rpm charts around. Perhaps checking out one will give you an idear of rpm your looking for.

 

 

What will be the primary function of the truck --street/highway use, mudding, rock crawling....?

 

Truck is only for fun drive here and there take in mud someday. Want to spin 40's if need be 4:10 can barely now

 

First of all, what axles? You never specified if your truck was a 150, 250 or 350

 

I dig it.

My reasoning is illustrated in post #5 as provided by JRGunn.

Btw, running 40s will find the next weakest link in the system like U-joints, steering links, and mounting points.

 

Sorry axles are Dana 60 front and back. f250

 

Truck in sig is on 40's with 4.88's. It is just fine for mall crawling.

I don't think it needs more gear.

 

My truck has 520 hp want to spins tires if needed. The 4:10 gears do not unless turning truck around corner. 40's on it are old and not in best shape so I want to replace them anyway. Do not mind melting them off. Possibly bigger tires when replaced so just looking for what others have in there rigs. Drove old friends truck with 750 hp and 42's with 5:13 gears I believe roached tires all day. Very fun. Looking for same thing minus couple hps

 

Nice truck by the way. Love white color my truck will be painted someday probably green again. Rather it be white but cab inside firewall inner fenders everything is already green