Rearend 4.88 gear help :confused:

if i wanted to drop down to 17 or 18 inch rims with 35x12.50x17s or 18s do i need to switch out the 4.88 gears ?? i need my pro's to help me out .. i have heard that i would have to bc the rpms would be higher on the highway if i didnt switch them out

My stats

38x15.5x20s wrapped in Toyo open country
1.5 inch spider track wheel spacers
ebc rotors and ebc green stuff pads
tundra racing brake disc conversion with disc ebrake
4.88 rear end gears with detroit locker true track
toy tech add a leaf
4 inch blocks on the rear
u bolt flip kit
6 inch fab tech lift
fab tech drop down brackets
3 inch bilstein 5100 adjustable coilover lift
bilstein 28 inch shocks in the rear
old man emu 885 coils
toytech strut spacer 1/2 inch on the driver side and 1/4 on the pass side to level out due to the gas tank weight
total chaos upper control arms (custom specs just for my lift)
performance accessories 3 inch body lift
pro comp limit strap
k&n intake
throttle body spacer
aftertmarket head lights and tail lights (forgot brand)
borla cat back

 

You wouldn't have to, your RPMs will be higher but not terrible with 35s.

 

Id go with 4.56 for 35's, Are you dropping the truck some?

 

He's a mechanic. He knows.

 

i dont want to but i might just a little

 

i am but i dont do rearends ASS !! lol

i dont do rearends or transmissions and im asking bc i dont know

and ive always worked on car and such but thats not my trade my dad is a 40 yr master tech but hes old school so im asking the people on here that know for sure

im a natural gas pipeline operator btw

 

Me? Him? Who? Sarcasm?

 

Him. And DEAR GOD YES, sarcasm.

 

http://www.tacomaworld.com/forum/tirecalc.php?tires=38-15.5r20-35-12.5r17

just found this so yeah at 65mph ill be around 3000rpms and if i went to 4.56 at 65mph ill be at 2800rpms so yeah i prob wont switch them out unless this chart isnt correct .. what do yall think ??

 

Chart's wrong. I plugged in my specs and they're about 600 high on the RPM.

33s and 4.56s get about 2400 RPM @ 65mph. 35s on the same ratio will spin even lower.

 

not real sure if 4.88 would even put you back to factory gear ratio there is a caculator out the somewhere I will look around for it had a ford with 35's it took a 4.56 to get it back

 

i dont really care about speed being off and rpms being the same as they are but i dont want them to be all crazy high

 

stalker hahahha!

I'm at 2400 @65 with 4.56 on 33's just like he said(pssst I think he knows his shit)

35's on 4.56's will be around 2100-2200. pretty close to what I was getting with 33's and 4.10's

 

this affirms the saying..everythings bigger in Texas

 

so what do ya think turd ?? you think it might just add a little to the rpms ??

 

like it was said earlier, dropping from 38's to 35's will bump up your RPMS, you'll feel quicker acceleration, MPG's

and just like a few people said, it's your truck and your money, you do whatever you want to it but there will always be people like me who will pick at it for a little just cause we have different opinions, but we do give the advice with sarcasm on the side

 

well i need 2 new tires and they are 471 each so if i can find some 17inch rims cheap then i can get all new 35 km2s for 300 each and it should be more than just getting 2 new tires but i can drop to 35s and save money next time when i need tires .. im not taking my lift down just yet im still lookin around to see what i can do to it lol

and sell my 20s or trade them to someone

 

when im at 65mph my rpm's are at 1900. while on the highway i find that between 65-70mph is the magic numbers as far as gas mileage goes.

 

315/75/16s at 80mph with 4.56s is at 3k RPMS for me.

 

you guys and your fancy 80 mph freeways...