9.5SF Swap

[randeez]

Yesterday It rained for the first time in awhile and I was playing around a little bit in the Tahoe trying to get some sliding going on. Kinda disappointed that it doesn't want to slide very much and almost feels like a open diff with just one tire is spinning. Not sure if the 285 nittos are keeping it straight and controlled or maybe my G80 is worn out? Or not a G80 like I was told?

Anyway the point in tagging you is I wanted to ask does your 9.5 G80 do good burnouts? I understand that they are supposed to unlock at a certain speed but I would like to have he ability to do 40+ MPH wheel speed burnouts. Not just for show but eventually it will see some track time and need to clean the tires in the water box. Just trying to make sure I'll be happy with the 9.5 as it is now and not regret skimping on a truetrac.

mine is awd....so the front tires spin 90% of the time i "dont have enough traction", it'll break the rear loose but if im on dry road it doesnt do much of a rolling burnout, the fronts just torch and you cant really steer if needed. thats with the borg warner transfer case though, havent swapped over to the np149.

 

[Dantheman1540]

Ahhh dang didn't realize you were AWD still. Just drove some more in the rain and did a U-turn on wet asphalt which is usually super slick. I punched it in second right when the wheels were full lock to give it the best chance of sliding but nothing. I spun 1 for sure I could feel it and the rpm jumped but no slippy drift action. Guess I need to do some more research. Not that I want a drift Tahoe or plan to slide through intersections like a maniac. However both tires need to spin together or its as bad as an open diff.

 

[Dantheman1540]

But its likely my 243k mile G80 is just wore slap out.

Randy FWD spinning while in AWD is badass!

 

[Tonyrodz]

Not that I want a drift Tahoe or plan to slide through intersections like a maniac.

Ummm.....why not??

 

[Dantheman1540]

Well I do just not all the time .

I often have to remind myself to lay off the skinny pedal and save it for the race truck. But a little wet road sliding never hurt anyone.

 

[Tonyrodz]

Well I do just not all the time .

I often have to remind myself to lay off the skinny pedal and save it for the race truck. But a little wet road sliding never hurt anyone.

Sometimes you just gotta

 

[Dantheman1540]

Just gotta hang it out sometimes

 

[Dantheman1540]

First snag the 10bolt brakes don't seem to fit at all. The rotor won't fit over the splash guard without being so tight you can't spin the hub. And the caliper won't fit without cutting the splashguard.

Think the 10bolt splash guards will fit the 14b?

 

[randeez]

welp.... i think the part *we* all missed is you going from gmt800 to this?

 

[Dantheman1540]

welp.... i think the part *we* all missed is you going from gmt800 to this?

That's exactly what I was just thinking lol. Although somebody on PT.net said they "should" bolt up. I think I'll see if I can swap splash guards since that's free

 

[Dantheman1540]

Ok crisis averted. The GMT80010bolt splash shields and parking brake will bolt directly onto the GMT900 9.5sf. Just have to pull the c clips remove the axles and yada yada.

Also got the U joint converter adapter dude installed. Didn't realize how nice of a driveshaft this thing has.

 

[Dantheman1540]

Got a good bit done tonight. Gonna have to source different or make my own brake lines. Need a different U joint strap for the 1350 on the axle side. Other than that parking brake is good to go shocks are bolted up as are upper links. Lowers are bolted to frame just gave up bolting to axle because I had to go do some data logging for a buddy.

Used a huge stainless fender washer and some grade 8 bolts to add to the bling bling of the lower links.

Crazy how big the 9.5 looks shoved up in it's new home. Also here's some G80 spider gear missing teeth from the 10bolt. Guess it was on it's way out.

 

[swathdiver]

View attachment 245812

Yikes, just in time eh?

On the GMT900s with the 9.5 axle, there are two part numbers specific for brake lines for use with that axle. 176-1541 and 18J4618. I remember Randy saying he didn't need new lines when he installed his but I kept the numbers just in case.

 

[Dantheman1540]

Yikes, just in time eh?

On the GMT900s with the 9.5 axle, there are two part numbers specific for brake lines for use with that axle. 176-1541 and 18J4618. I remember Randy saying he didn't need new lines when he installed his but I kept the numbers just in case.

Yep I had no idea it was ready to blow. The PO said he blew up a Yukon Duragrip when the truck had 4.10s or 3.73s. After that he found a used G80 and 3.42 gears to stick in it. So I assume it looked nice and new a year or so ago.

That's great info on the brake lines! I will have to look into those. I have the lines from the 9.5 but they aren't going to work unless I modify where it attaches to the "Hanging line" GMT800 is a single line that connects where the GMT900 has 2 lines that come down.

Worst case scenario I just make all new lines I have the tools its just a pain in the butt.

 

[Dantheman1540]

Yikes, just in time eh?

On the GMT900s with the 9.5 axle, there are two part numbers specific for brake lines for use with that axle. 176-1541 and 18J4618. I remember Randy saying he didn't need new lines when he installed his but I kept the numbers just in case.

I didn't realize those part numbers were for the center connections. I'm struggling to find a decent diagram that shows the rear line routing on the GMT800 suvs. Wondering if its possible to just get 176-1541 and use the 9.5 brake lines I have.

 

[swathdiver]

I didn't realize those part numbers were for the center connections. I'm struggling to find a decent diagram that shows the rear line routing on the GMT800 suvs. Wondering if its possible to just get 176-1541 and use the 9.5 brake lines I have.

Sorry that I left that out, it was way past my bed time when posted! Do you have an AllData DIY subscription? Might be in there, don't recall seeing mine either from a diagram.

On my truck, the left and right rear lines are the same regardless of axle, it's those center ones that are axle specific.

 

[Dantheman1540]

Sorry that I left that out, it was way past my bed time when posted! Do you have an AllData DIY subscription? Might be in there, don't recall seeing mine either from a diagram.

On my truck, the left and right rear lines are the same regardless of axle, it's those center ones that are axle specific.

It was far past my bedtime as well and I'm paying for it now......Zzzzzzzzzzzz..........

No I don't have an all data subscription honestly this is the first I've ever heard of them. Usually GM parts direct has IPBs for everything but in this case they don't which is odd. I think I'll pick up the center connection for the GMT900 and if that works then great if not I'll return it and go custom.

I did just find 1350 series straps and bolts in town which is nice. I don't think the drive shaft will need any modifications besides the one U joint.

 

[Dantheman1540]

Can't seem to find 176-1541 in town anywhere but I did find each center line individually so I might grab 2 of those.

https://www.autozone.com/brakes-and.../duralast-brake-hose-79041/70246_0_1903_88458

Never mind they are special order only.

 

[Dantheman1540]

Anyone interested in the 10bolt? I'm located in central Florida but don't mind driving an hour or so to meet 6 feet apart. Really don't expect to get much out of it $50 maybe? Anyone in desperate need or want the 3.42s? G80 is pretty much toast but shafts, gears and housing are still fine.

 

[Dantheman1540]

Well it's done. Stand by for burnouts.......

One picture is full drop the other at ride weight. Bags still need the lines routed and I plan on some more bling bling after a could weeks of testing.