^^ true, but get yourself a nice little foriegn job for gas ! Or a bike. truck are not supposed to be gas effecient. Nor are the lifts, tires, and other mods we continue to add

 

I like the selectable. I'll have a detroit in the rear of mine when the LSD wears out. i'm hoping it will last another year.

Oh and 4.88's on the highway. Difference is 200 rpms. its almost insignificant. Its 6% difference between that and 4.56's. Get the 4.88's, enjoy the truck now, enjoy it when you get bigger tires, and enjoy it when your buddies are stuck and you are pulling them out with all your power.

 

WoW guys thanks a lot for all of the information.
Now i just need to decide between the 4.56 and the 4.88. you guys got me in a bundle now. I do drive mostly around town but highway a lot on the weekends always traveling to my motocross races and stuff. And should i get these installed when i get my lift put on or what?
thanks again guys.
-Mike!

 

You really cant go wrong either way

 

ok, just a quick question. do install kits not come with new bearings? At the place that did my gears, I supplied the gears, they supplied install/kits/fluids, so did that not include bearings? I still have that roughness tnsilverfx4, even after taking it back to the shop. they drove it and said all was good they couldnt feel/see/hear anything bad....

 

Thanks agian guys for all the help. Maybe later this year after i get my beast lifted i will get some gears cause my lift is already costing me enough cash money! later all.
-Mike!

 

There is a huge array of install kits. Some simply come with new seals, some just come with new bearings, and some come with everything ya need. Its hard to say, you could always ask the "installers" . Maybe look at the bill, did they list the "install kit" ? Part number ? You could look it up with the number.

Hopefully they did new bearing (Timken... sp ?) for ya.

 

How new is your truck? If it has under 30k miles on it they may have just used the old bearings. Anything over 30k and they probably used new ones. A Master kit has bearings and a minor does not. An 8.8 master is about 100 bucks, and a 9.75 master is about 200. That should help. Go look at your invoice.

As far as the grinding, does it do it when its cold outside? does temperature affect the sound? Is it a high pitched whine, or an actual metal on metal grinding sound? How many miles do you have on the gears since they were installed? In many cases you can eliminate noises by simply changing the diff. oil after break-in.

If you already broke them in and changed oil, i would consider looking for a second opinion.

 

Truck has 45K miles on it. They used Hyrdomaster/hydrologic?? something like that kits. I only know that b/c they left one of the boxes in the back of the truck. its more of a metal on metal roughness. to describe it: in cruise control at 65 mph it seems to be a "circular roughness" it comes in intervals, and at decelleration is when it becomes really noticable, almost like the engine/trans brake on newer honda atvs. thats the best way i can think to describe it. the gears only have 160 miles on them. it does do it when its cold outside, there is a bit of whine at higher speeds, but i cant tell the difference between the tires and anything else that may be whining..