Happy B-Day to Me!!! 4.88's & Fr & Rr Full differential Service Kit...... (1 Viewer)

[cc93cruiser]

Well needless to say that I am really excited about the parts that just came in for my 93 cruiser.. I recently swapped the 33" MT's for 35 inchers and it was enivitable that I had to swap my gears out for some lower ones. After much research in MUD, and a couple of phone calls to Slee and Mudraks, I concluded that 4.88's would be the best bang for the buck instead of the 4.56's that is...You obviously get more performance with the lower gears for the same amount of $, so why not. 4.56's with 35's would just bring me back to stock form....So I ordered the 4.88's from Precison Gears and the install kits for the Fr & Rr.. While the 2 differentials are all in pieces, I decided it would be a good idea to do a front differential service (birf job) with all new bearings, and also the rear differetial service with all new bearings too...I wanted all new parts/bearings because the cruiser has nearly 190k and was not sure of the service/maintance history from 160k on (although everything was in extremely good condition).. So I called C-dan and told him to hook me up, which he did....Thanks c-dan.....So now the installation...I wanted to do the the Fr & Rr service on the differentials myself, but swapping out the gears, I decided not even to mess (backlashs, inch pounds, specialty tools etc etc....)with, and therefore I am just taking the whole enchilada to a local mechanic. I want it done right the first time, I don't want to experiament on my cruiser, after all I have never done a ring and pinion gear swap myself....So, here are some pics of the parts, and the cruiser it is going into to.... I will let you guys know what happens:

All new bearings

Finally the crusher....................

 

[Biff]

Hey bert, congrats on the 4.88's your rig is going to be killer.

 

[cc93cruiser]

Thanks Vic, dude I can't wait to wheel it and just drive it on the freeway and notice the difference in acceleration. Surprisingly, around the city the cruiser feels the same with the bigger rubber, but on the freeway after about 50-60mphs, the cruiser is a dog...I could just imagine going up steep hills......ugh..........that would suck..........

 

[Biff]

I noticed a huge improvement just by going to 4.56 and staying with 33's.

 

[Cube Dweller]

Sweet!

Mind sharing costs? If I can find a stock, locked 80 dif I'll be doing the same. Looks like you're going to run a crush sleeve instead of spacers, any feedback from the gurus around cost vs. benefit?

I'm also debating sending the R&P to Bobby Long to work his magic...not sure I'll need it w/ 35's but...

 

[cc93cruiser]

costs for the all parts was just a tad over a grand, gears & install kits were about 650.00, the rest of $ was the service parts.......

 

[Cruiserhead05]

Robert.

Very nice.

Is the truck running J's or just heavies? the pics are kind of hard to tell.

 

[landtank]

good choice on the ratio, you'll love it. What are you doing about speedo correction?

 

[cc93cruiser]

good choice on the ratio, you'll love it. What are you doing about speedo correction?

good ? what could I do Land tank? tru speed speedo correction, or what are my alternatives....it it even a big deal, I mean I will be going faster than what my speedo says, thats it right?

 

[ed97fzj80]

That should be sweet, but just looking at the pictures makes my wallet hurt.

 

[Cruiserhead05]

Robert,

thanks for the pm.

J's + 1inch spacers and no vibes, very lucky.

 

[OGBeno]

Do the ring and pinion yourself...they are not that difficult. You need a metal marker, a dial gauge indicator (preferably a digital one), a hydraulic press (any machine or fab shop should be able to do the work for you for a small fee);

The ring and pinion are similar to doing a front birf job...seriously...

Looks great and the upgrades/PM are worth it.

4.88 in my future someday too....

Cheers.
-o-

 

[Hondo]

I recently installed a Truspeed and I'd have to say that it made a pretty big difference on its own. I'm running 35's with stock gears on my 1994, and what people were saying about the computer and speed input into it affecting fuel supplied and shift points makes sense now.... I had the Truspeed sitting in my garage for several months before I finally installed it and now wish I had installed it sooner.

Truspeed or yellow box(see woody's review) seem to be the way to go. Price-wise the yellow box is cheaper, but the truspeed might get you a little more accurate (set with GPS while driving).

 

[landtank]

good ? what could I do Land tank? tru speed speedo correction, or what are my alternatives....it it even a big deal, I mean I will be going faster than what my speedo says, thats it right?

Having the speedo corrected will help with your shift points in keeping them with in the power band of the engine.

I have the truespeed which was the only thing available at the time. On the sites front page there is a write up on the "Yellow Box". It was installed the same way that we are installing the behind the glove box.

While the yellow box doesn't allow for 2 settings which is nice if you run a different sized set of trail rubber it is almost half the price.

The truespeed uses a multi-turn VR to adjust the compensation which pretty much requires a GPS to get it dialed in. The yellow box has a bank of switches that you calculate the % of compensation needed and throw the appropriate switches.

Some might argue the VR method is more accurate, which it probably is, however the switch is more than adequate considering the speed change threw the wearing of a 35" tire.

If I had the choice I think I'd go with the yellow box instead because of the ease of setup and price.

 

[T Y L E R]

Nice!! When you take 'er for a test drive I want a play by play!



TY

 

[yellowchaosfj80]

What TY said.... . This is my summer project . 4.88s

 

[rockclmbr]

What a gift to yourself! Just curious, what shop in Redwood City are you using?

 

[gnx7]

Looks like a great setup. What kind of fuel economy are you getting with 35's and stock gears right now?

 

[cc93cruiser]

I recently installed a Truspeed and I'd have to say that it made a pretty big difference on its own. I'm running 35's with stock gears on my 1994, and what people were saying about the computer and speed input into it affecting fuel supplied and shift points makes sense now.... I had the Truspeed sitting in my garage for several months before I finally installed it and now wish I had installed it sooner.

Truspeed or yellow box(see woody's review) seem to be the way to go. Price-wise the yellow box is cheaper, but the truspeed might get you a little more accurate (set with GPS while driving).

Hondo, is this yellow box is plug/install and play recalibrator, or do you have to get a specific yellow box for your tire/gear combination, or do you have to program prior to installation?????

 

[cc93cruiser]

What a gift to yourself! Just curious, what shop in Redwood City are you using?

Hey Jasper, how have you been? I seen your buddy Mark's new 40, sweet!!

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