deanhinsley1963

Pardon a dumb question but it looks like the stock sachs clutch is alot better unit,has wider pp face and disc. But I understand the sb is supposed to be an upgrade can anyone explain?

Subliminal

Yeah, upon just looking at them, there appears to be a much larger mating area on the Sachs than the SB. I can only assume that the springs are the main benefit.

Also, the SB PP weighs about 1/2 that of the Sachs. The tranny builder I was talking to said that the old Sachs had many a problem with balance (which I think was my problem).

But yeah if you look at both of them, the Sachs is definitely more impressive looking.

deanhinsley1963

Thanks subliminal! Just thought I would throw that out there.

patdaly

LOL, That's what I call a poor mans Double Disk........

Never saw a real Sachs unit before, now I see why they are legendary.

Subliminal

Poor mans? That's about $1200 worth of clutch sitting there.

1990

How long is your driveshaft?




Seriously though. The one in the picture.

Subliminal

Ha...uhm....that sounds personal.

I'm not sure, I could measure it when i get home if you'd like. It's just stock length with the getrag.

1990

That would be great. Thanks

Crossy's son

The crappy part about the sachs setup is the weak pressure plate, yea it's heavy cast iron and heavy duty , it's only 2800# clamping force vs. every 94 and newer clutch is #3400, and this is what southbend and valair all use for their clutch kits, is this newer #3400 lbs' of clamping force pressure plate, they last up to 200,000 miles in stock 2nd gen cummins trucks so why not ours?

My dad's buddy has a 99 with a 5 speed and the original clutch with 192k miles on it last time i talked to him. Obviously a proven style pressure plate and more clamping force means less chance of slippage

I have a "2nd gen 13" Conversion" clutch kit in my truck with the kevlar/ceramic facings, yea it's harder to push because of the 600# more over a sachs, but you get used to it in a day, .... and when i go back to a sachs in the 92 I am like wow this thing feels funny

The sachs unit that was in our 93 DID make it to 350k miles, but as soon as i TOUCHED the pump, meaning just rotating the fuel pin and 1 turn on the power screw, it would slip ridiculously in 4th and 5th

I think for a stock truck the sachs clutch is awesome, it's easy to push and lasts a while but if you have big tires or your pump is turned up, just upgrade to the newer style with #3400 pressure plate like almost all the kits come with now, basicly if it's not a cast iron sachs PP, then it's the stamped one with #3400 of clamping force

My .02

Richie O

I'm running 300 horse through my stock 137k mile sachs. I make sure its engaged fully before I get on it, but it has never slipped. I have no idea whats in my 92 with the 4500 tranny, but I will say what ever is in the 4500 truck is super smooth backing up loaded, and my 93 sachs is a bucking bronco with a 5th wheel behind it backing up.

Crossy's son

The sachs in the 92 is always a bucker, 1st or 2nd it wants to like bounce the truck.

your NV4500 truck probably has a 2nd gen 12.25 or maybe even 13" setup in it with a stock clutch disc. They engage smoother than a sachs but should have a tad more pedal pressure

gadget.35-06

For what it's worth, I'd never have another SB. Nor will I ever trust a shop to replace a clutch for me. Both have been disasters for my 06.
My 91 always did fine with the Sachs clutches; my only beef with 'em was the pilot bushings; if I'd had the money at the time to buy a modified flywheel with a REAL pilot bearing the clutch would likely have been a real JOY to drive. This was, unfortunately, long before I knew of forums like this.

gwilming

I am just about convinced to get a tranny from this guy in Indiana. After seeing subliminal's pictures of the new one I am convinced. My g360 made it less than 40,000 miles on the rebuild. I think I got a sub par rebuild and I don't trust them to do it again even if they do only charge me $600.00. It sounds like this guy in Indy puts together a solid tranny.