Wife's 1990 GMC

[bigblock454]

bigblock454 submitted a new Build:

Wife's 1990 GMC

Wasn't really planning on a full build thread for a driver, but it keeps getting deeper! Truck has 130k miles and has almost zero rust, so worth the effort.

Doing general maintenance ran into the first serious problem while changing the rear gear oil, 5-6 missing chunks like:

More slop than I'm used to seeing from the spider to axle shaft, and some really nasty oil! The ring and pinion look ok, and the current backlash is at 0.017", probably why it sounded ok on the way home.

Current tires are 31s, but the wife would like to go to 33s at the next tire change, current tires probably have a good 2 years left on them. This is 95% an in town machine (no wheeling, very light highway), so I'm considering jumping to 4.56s since the rear carrier is for-sure toast and hard to trust the gears, and maybe the axles depending on where the spider to axle slop is. Axle seal surfaces are not great.

Any good places to purchase complete kits for front/rear 10bolts? 4.56s will put her at 2300 RPM at 70MPH and be great in the city, any other opinions here?

Same pict from PAD:


Slew of parts on the way to freshin the chome flaking grille and other trim, wife is very happy!

View attachment 230323

Read more about this build here...

 

[GWeakland620]

Sooooo Purdy!

 

[76k5blazerr]

Very nice find

 

[bigblock454]

I was a bit worried a deep pan wouldn't clear the front drive shaft, but comes out to about 1/2" of clearance! Probably not enough for hard wheeling, but should be ok for DDing, and made in the USA!

 

[bigblock454]

So I bandaided the rear with some less worn spider gears and pin, but completely forgot to measure the stock axle length before I put it all back together? Anybody know the correct length of the 1990 30 spline 10b axle?

 

[bigblock454]

Wife came home today and said her truck suddenly developed an exhaust leak:

 

[bigblock454]

Any confirmation on the correct front drive shaft u-joints? My google fu is failing me.

Two at the cardian joint = Moog 235s? (S44 or 3R, can't seem to cross this to a Moog part)
Drive shaft to axle = Moog 225?

Any suggestions welcome, this is not wheeled, just need something easy to grease, like the Moog with the zerk in the caps.

 

[PWagon]

This is a great looking truck!