i just got my truck regeared they put 4.63 in rearend and 4.56 in frontend will this cause problems . also after i had this done when i turn left or right i have a hard vibration any idea ? 4 wheel parts is were i had the work done at 06 dodge 2500 megacab 37 bfg with a 5 in lift and the tires are not hiting anything to cause this vibration

 

Uh yeah, that would cause some problems, since the front is higher geared it will pull like mad and shell out your transfer case when in 4wd.

 

Big problems.....that is bush league.

 

Definitely a problem unless you are running different size tires from front to rear.

Both the front and rear should be the exact same ratios or else the transfer case will grenade if you can even get moving. If used only on ice or slippery mud then less chance of damage.

 

i have ran it in 4 wheel drive and no problems yet i put in 4 hi at40 mph i have had some shops tell that it is fine and others say they dont no for sure one dealer said it wont work and one said it will so i guess my truck will be the test

 

Actually your front and rear gear ratios should match. The 4.63 is an AAM (OEM) gear set for the 11.5 rear axle. Unfortunately, AAM does not make a matching 4.56 gear set for the 11.5 rear axle. Just as an FYI, US Gear an OEM supplier, does make a matching 4.56 gear set for the 11.5 AAM rear axle.

The vibration does not sound right. I would call a few diff shops like Randy's Ring and Pinion or West Coast Differentials and run it by them. They should be able to tell you if they have done gear swaps wiith that much of a difference between the front and rear axles and if there woud be any negative side effects.

 

i have heard of this before,it will not really affect anything,the reason they do it is so that on slippery surfaces the front tires will rotate slightly faster than the rears,this is supposed to help it track better.if you drove it for a long distance on dry pavement you might see a problem,but lets face it,your in 4x4 only in snow,sand,mud or rocks,dont worry about it.if it were 4.10 to 4.56 or something like that,then it would be a problem...

 

You'll be fine.
If there are any questions call Sean @ River City Differentials in California. 1-916-852-7109 He will get things straight for ya.