K30 w/hydroboost clutch pedal solution

[Frankenchevy]

Franken-

I've been trying to figure out how one changes the rear deal in the 4500 (4wd). From what I can tell, there is no seal in the adapter and the space inside the adapter will contain fluid for the 5tth gear.

However, there had to be a seal on the output shaft between the trans case and the extension?

You any info on this?

Not sure until I pull the th400/208 apart. My 4500 will be here Tuesday. I’ll be able to better wrap my head around it then. I’ll be diving in next week. Just some prep this weekend, might pull the 400/208...

I’m going to weld up a crossmember to avoid the 4” block spacer. Seems like a better idea than plopping a chunk of 4” box tubing on top of the existing flat crossmember.

 

[TubeTruck]

I’m thinking once I get a clutch pedal in, I’m going to need a thinner backed bench. There isn’t much leg room. I’m not super tall at a bit over 6’, but I have the same inseam as my brother who’s 6’4”.

I’m going to keep my eyes peeled for one from a 88+. They seem like they have thinner backs.

Part of the reason I like my Suburban. The seats sit back further. I'm 6'2" and wear a 34-36" inseam but I feel like there is so much more room in the Suburban. I just need a tilt column and I'm set.

 

[SquareRoot]

Ok, just in. I just verified measurements on the over length of my th400 to the mounting face of the 208. It is 26 3/8th which is EXACTLY the same as the NV4500/4wd adapter sitting in my garage.

Also, the trans mounting location for/aft is exactly the same. Not sure about the height location, it may need a spacer once I get it under the truck.

So, I'm gonna do this conversion in two stages. I'll swap pedal assembly, hydro boost and trans first. Leaving the 208 in so I'll be able to drive it until I'm ready to swap the 205/twin-stick stuff a little later.

 

[Frankenchevy]

Ok, just in. I just verified measurements on the over length of my th400 to the mounting face of the 208. It is 26 3/8th which is EXACTLY the same as the NV4500/4wd adapter sitting in my garage.

Also, the trans mounting location for/aft is exactly the same. Not sure about the height location, it may need a spacer once I get it under the truck.

So, I'm gonna do this conversion in two stages. I'll swap pedal assembly, hydro boost and trans first. Leaving the 208 in so I'll be able to drive it until I'm ready to swap the 205/twin-stick stuff a little later.

So your NV 4500 has a four-wheel-drive adapter? Everything I’ve seen, Which admittedly isn’t much, the 208 bolts directly to the back of the transmission with no adapter.

 

[SquareRoot]

They all have an adapter unless it's a 2wd version with a slip yoke.

 

[Frankenchevy]

They all have an adapter unless it's a 2wd version with a slip yoke.

Hmm, I got a 96 and up four-wheel-drive transmission from advance adapters and their bell housing. They told me that I bolt my 208 directly to the back of the NV 4500. Like I said, I guess I will be able to make better heads and tails of it once I have all the pieces in front of me.

edit: I see what you’re talking about now. I stand corrected. What was tripping me up is them saying to remove the adapter, but that’s referring to the pedestal adapter for the 400...

 

[SquareRoot]

Yup. That's correct. Just like mine. The tail housing (adapter) comes in 3 configurations. They're all 6 bolt round pattern. Bolt her up and go.

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[Frankenchevy]

Yup. That's correct. Just like mine. The tail housing (adapter) comes in 3 configurations. They're all 6 bolt round pattern. Bolt her up and go.

You must be registered for see images attach

Nice! 95 & down right?

 

[AuroraGirl]

Those studs on the bracket for hte pedals.. how come some trucks have 4, some have 2? its the brake pedal part that reinforces against the firewall/booster area.

 

[Frankenchevy]

Those studs on the bracket for hte pedals.. how come some trucks have 4, some have 2? its the brake pedal part that reinforces against the firewall/booster area.

Hydro boost have 2 more studs coming from the engine bay side, so the pedals only have the other two out of four.

 

[SquareRoot]

Those studs on the bracket for hte pedals.. how come some trucks have 4, some have 2? its the brake pedal part that reinforces against the firewall/booster area.

They all have 4. It's just that ones with two have the missing two pressed in from the other direction. I think it's so you don't try to get them mixed up because the brake rod and clutch rod have different lengths and geometry.

 

[SquareRoot]

Got my vacuum booster out. What a pain in the ass! And yep, the whole instrument panel and guage pod had to come out. And insult to injury, the steering column has to come out. You can't get the pedal assembly in or out with the pedals attached otherwise.

 

[SquareRoot]

Nice! 95 & down right?

Ya. I got two of them. Ones a spare that needs rebuilt. Some nimrod ran regular gear oil in it.

 

[SquareRoot]

Those studs on the bracket for hte pedals.. how come some trucks have 4, some have 2? its the brake pedal part that reinforces against the firewall/booster area.

Here's the other side of the firewall. Just pulled the vac an hour ago. The hydro boost has two studs pressed in from the engine side. I noticed the casting won't allow for a flanged nut to clear so they pressed studs in with small diameter heads. You just have to crawl under the dash to find the nuts instead of bending over the fender.

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[Slybeanx]

Check my nv3500 swap thread, you could do what I did for the master to the manual pedals. Been working great for me for around 3 yrs now, maybe 4.

Glad I found your thread while digging through manual swap stuff. Looking to find all the parts to throw an AR5 in mine.