P/N needed for 1st Gen Clutch disk

[GIT-R-DONE]

Would anyone out there happen to know what the Mopar part number for the clutch disk is? Getrag 5 speed 1990 truck. Thanks

 

[bgilbert]

13". Cover and Pressure Plate Assembly 4429153. Disc Assembly 4429151. Plate load in pounds 2340. Facing diameter outside x inside 13 x 7. 28. Spring number and color 6 orange.

Some other specs from the 89 FSM Diesel Supplement:



Model Disc (F&S) - 43 1861 999 160

Model Cover Plate (F&S) - 13 3482 999 037

Auctuation - Hydraulic

Facing-Thickness total - . 394"

Total Pressure - 2340

No. of Diaphragm Spring Fingers - 24

Facing Material - Raymark M8400

Release Bearing - Permanently lubricated ball

Pilot Bearing - Oilite bushing

Hub spline diameter - 1 1/4" (10 spline)

Vibration damping springs - 8 main-stage, 6 pre-stage.

 

[BHiggins]

There's one for sale on EBay... I don't think it's a complete clutch, I think it's just the disc. EBay number is : 8034946020.

 

[ScottLowry]

You can upgrade to the 12 1/4 inch clutch it has a higher clamping force. I did and it's been great. Clutch Kit was $239 with bearing. I can give you the number to the place to order it from if you want.



Scott

 

[bgilbert]

Why would you want to downgrade to a smaller clutch? 13" to 12 1/4.

 

[ScottLowry]

That's not downgrading. Your going to a higher clamping force with that clutch. Higher clamping force equals better holding pressure.



Scott

 

[GIT-R-DONE]

I am also debating on not putting in a new pressure plate. Truck is going to be kept close to a stock level. Truck has 235 K on it now. I will resurface both flywheel and pressure plate if that is possible. Any suggestions about all of that... . ?



I checked out the one on EBAY..... thanks.

 

[ScottLowry]

You need to have a clutch shop do the pp. Mine charges $50 to rebuild it (surface and check pressure) They charge about $100 to do the disc(if it can be rebuilt). The can upgrade the disc material to Feramic if you want also. But that is not needed for stock.



Scott

 

[GIT-R-DONE]

Going to try and post some pics, see what happens. Ok, first is the Old clutch, second is the new OEM Stock clutch. Third pic is the measurement thru the spline shaft, and last is the measurement of the new clutch thru the spline shaft. Notice the difference in measurements? 1 and 13/16 with the old clutch and the new measures in at almost 1/2 inch (thinner)difference.



My question is will this hurt anything going to a smaller thickness of shaft contact area. Will it make any difference on the install or after-wards?



Also this old clutch is 13 inch Diameter, and the new measures in at 12 3/8. Loosing some contact area on the plates but would it make any noticable difference?



Its weird too that the old one has what appears to be weights on it and the new does not. Hmm.....

 

[bgilbert]

Does the new one say Sachs on it? Sure you didn't get sold a 2nd gen 5sp clutch?

 

[GIT-R-DONE]

Does the new one say Sachs on it? Sure you didn't get sold a 2nd gen 5sp clutch?

I dont think so... ... isnt the 2nd generation truck clutches 11" ?



The old clutch says Fitchell (sp) and Sachs on it ... . made in West Germany... ... so I assume it is original. Truck has 235 K on it but was not abused at any time of its life. ( I know the history of it ).



The new clutch has the Mopar # that matches what the dealer said the P/N was... ... but also has the LUK logo on all the rivets and is stamped on it, front and back.



It just kinda bothered me that the main shaft thickness was more narrow than the old one and that it was just a touch smaller.

 

[bgilbert]

2nd gen are 12 1/4". You didn't know that dealers are not aware that Dodge built a truck before 94?? IIRC Luk makes the 2nd gen clutches. Take it back. They are not as strong as 1st gen clutches.

 

[Paychk]

If you go into just about any parts store they'll sell you a new clutch but it is a 2nd. Gen. clutch. Especially if it only costs $200-250, a real cast iron Sachs 13" will cost a min. of $400. Looks like Dodge is doing the same thing. Dan @ Quad4X4 recommends staying with the Sachs if you plan to tow.

 

[ScottLowry]

The 12 1/4 clutch has a higher holding pressure. I have one in my truck and I don't have a problem with it. I haul and tow a lot with it (24-27k total weight)



Scott

 

[Paychk]

Contact Dan @ Quad4X4.com, he has seen more clutches than most in severe service, his advise is to stay with the stock clutch. There are more things to consider that just clamping pressure, things like the clutch hub & damping springs. The Luk will not go 200,000 under extreme towing, the Sachs will.



BTW How many miles are on that 12 1/4" ?



14 dampner springs Sachs

8 dampner springs Luk

 

[GIT-R-DONE]

BTW How many miles are on that 12 1/4" ?



14 dampner springs Sachs

8 dampner springs Luk

"0" miles on it... . Gonna put it in here in a few weeks and see what happens. Dont do any real towing here, basically a daily driver.

 

[Paychk]

You should have good luck with it then, I would only reconsider if towing was your main purpose and it isn't. Definetely replace the pilot bushing in the flywheel as that is a known weakness.

 

[bgilbert]

FWIW it's not gonna hold 750rwft-lbs like the Sachs holds.

 

[mysteryman]

The 12" clutch is no upgrade at all ! The only thing that improved was Chryslers profit margin ! The only reason the clutch was really changed was because we learned that the expensive 13 clutch that we used in the 1st gen trucks was not wearing out ... . So it was decided that a cheap stamped steel cover would work just fine and that less friction material on the disc caused less chatter and wore out much faster ... ...



The fact of the matter is that many of the 1st gen trucks components were over built because we did not really know what was going to happen in the field yet..... By the time the second gen came out they had all the data needed to know which components could be cheapened and which needed improved to make it out of warr.



I hear many talk about changing out your 13" clutches to the double disc or other hot rod clutches... . When or if you do please let me know before you throw away your stock 13" clutch... . I would like to buy it from you.....

You can upgrade to the 12 1/4 inch clutch it has a higher clamping force. I did and it's been great. Clutch Kit was $239 with bearing. I can give you the number to the place to order it from if you want.



Scott

 

[Paychk]

The 12" clutch is no upgrade at all ! The only thing that improved was Chryslers profit margin ! The only reason the clutch was really changed was because we learned that the expensive 13 clutch that we used in the 1st gen trucks was not wearing out ... . So it was decided that a cheap stamped steel cover would work just fine and that less friction material on the disc caused less chatter and wore out much faster ... ...



The fact of the matter is that many of the 1st gen trucks components were over built because we did not really know what was going to happen in the field yet..... By the time the second gen came out they had all the data needed to know which components could be cheapened and which needed improved to make it out of warr.



I hear many talk about changing out your 13" clutches to the double disc or other hot rod clutches... . When or if you do please let me know before you throw away your stock 13" clutch... . I would like to buy it from you.....

Wow whoda thunk it?



And people wonder why I put up with an old truck! :-laf Oo.