Clutch Replacement Questions

[90GTZHO]

So im now in the money to get my GTZ back on the road but im having a hard time deciding which clutch kit to order for the car. I dont need anything more than a "stock-type" clutch kit since im no longer gonna turbo my car.

Im up in the air between a clutch kit from RhinoPac and AC Delco. From the pics i see on Rock Auto Parts' website, the AC clutch has a 4-spring disc and the RhinoPac one has 6-springs. I do have the 3.94 tranny in my car so its got the internal setup, if that matters.

I just want to make sure i wont have to rip the trans out sooner than expected. I know AC clutches are what comes stock, but im curious if anyone has any experience with the RhinoPac clutches. I would like to get some opinions as soon as i can as i want to order the parts this week. And before anyone says anything about it, i dont want a high performance clutch as i want to maintain my daily drive-ability.

Thanks for anyone's help

[3X00-Modified]

Its actually 5 springs, depending on which clutch your looking at though... But at the same time I doubt that photo is the actual part your buying.

The choice is yours though.. RhinoPac is simply just another OEM matcher just like Sachs they are just a bit more expensive.

FWIW I'm installing an "OEM" clutch into my Subaru and thats made by Exedy, both the plate and disc are stamped but they are in a Subaru Genuine box, so I know the Exedy OEM brand is ok.

[90GTZHO]

Yeah, im kinda leaning toward the Delco clutch kit, just cause i know its OEM for sure.

[dhenderz]

Geoff - the original supplier of the clutch for our cars was Exedy. Last time I looked Rock had Exedy available at slightly less money than the Delco part (because you don't pay another pass through mark up via Delco distribution). That's what I put in my car.

[90GTZHO]

Yeah i saw one local parts house can get the exedy clutches, but i dont see them listed on Rock Autos site for the 94 GAGTs, all they have is rhinopac, delco and sachs.

[3X00-Modified]

I thought you were looking for a clutch for your 90gtz...

I guess we need to know what number is coming out before you can figure out what goes in.

Does the 3.94 trans have the same clutch type as the original gtz trans did?

Rock auto doesn't have all the listings either...

Here are all the clutch kits that fit a Pontiac Grand AM... GT was different from the SE

04136 1993 - 1994 GRAND AM GT L4; 2.3; Non-Turbo; Gas(ALL)
04135 1993 - 1994 GRAND AM SE L4; 2.3; Non-Turbo; Gas(ALL)

Link to their OE website too.
http://www.exedyusa.com/oe/

[3400beretta]

Geoff, make sure you order the clutch for a 93/94 car, there IS a difference between external and internal slave clutches, incase you already didn't know.

The exedy part number for a 93/94 HO quad is 04136. To be clear the correct ac delco part number would be 381037.

For some reason exedy lists two different clutches for the 3.1 vs the 2.3. If you look at all the other manufacturers, the clutch part number is common between the two engines. I wonder what the difference is with the exedy clutch. I would lean towards ordering the 3.1 version (04132), as since it had a higher torque rating from the factory, it may be a slightly better clutch.

[Barry]

The 2.3 and 3.1 clutches are different IIRC, I think that GM info that Weba posted shows that.

Rodney, what is different between internal/external clutches? I put 2 external clutches in my internal trans. It works, but there could be something not right I guess

[3X00-Modified]

I would assume difference has to do with the depth of the pressure plate when installed, so that would change your preload, or slack between the throw out bearing and the pressure plate fingers. Once again I'm not sure how ours are setup if they are supposed to be a preloaded throw out bearing or a clearance one. I can only speak for my legacy and from what I can see there is a load on that throw out bearing all the time so its always spinning and not free, I could be wrong though, I haven't actually taken it apart I've just felt the fork.

[Barry]

Thats very possible. My clutches disengage wight at the top of the stroke, then the rest is all free play. My nissan engages really low.

[scd88ga]

The external slave Quad and 2.8/3.1 V6 clutches are the same.

The external slave 2.0 and 2.2 4cyl clutches are the same as each other but different (smaller) than the external slave quad/V6 clutches.

The pressure plate and disc is the SAME in ALL the Quad 4 and V6 internal and external slave transmissions. The only reason the part number is different between the two is because the internal slave clutch kits come with a new slave cylinder.

[3X00-Modified]

I'm looking at the GM scanned specs that weba posted.

1993 3.1 v6
Pressure plate Total Spring Load 1470lbs
Pedal Effort depressed 30lbs
Pedal effort released 30lbs
Disc effective area 232cm <(I think this is only half of actual after looking at the specs closely)

1993 HO quad
Pressure plate total spring load 1325lbs
Pedal effort depressed 34lbs
Pedal effort released 0lbs
Disc effective area 442cm

1990 same application the specs are the same as above for the respective V6 and Quad4...

I will totally agree with you that the internal and external slave setups are the same, but I think the above info explains the reasons for some saying quad4 and v6 clutches are different. Maybe thats not so in the "replacement part" world, but at one time they spec'd them differently and they were two different manufactures.

[scd88ga]

My info is based on strictly the available aftermarket, even though current ACDelco part numbers are still the same regardless of what the GM Heritage scanned specs say from 20 years ago.

[3400beretta]

Well if the slave cylinder comes with the 93/94 internal clutch kits, and a throwout bearing comes in the 90-92 external kits then there IS a difference is there not?

Also, my reference to the fact that Exedy has a different part number for an internal quad car, than for an internal v6 car shows that FROM EXEDY there is a difference between the two. If you look at the pictures on the exedy website, the v6 pressure plate is clearly different from the quad 4 pressure plate. I am WELL aware that you cannot rely on pictures, but since the V6 does output more torque, they may have skimped on the holding capacity of the quad 4 version, and since we KNOW they are interchangeable my suggestion to opt for the V6 version is justified.

[Barry]

According to GM, the 3.1 has a clamping force of 1470 Lbs and was originally made by LuK.

The quad 2.3 only had 1325 Lbs and was made by daikin. That was in 1993.


Heres the source
http://www.gmheritagecenter.com/gm-heri ... eretta.pdf

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