need some help. I'm putting the 4 speed in my 87 gt to replace the automatic. I have the complete swap minus needing a clutch. i do have the pressure plate and t/o bearing.
I posted a wtb in the mall and a seller says he gas a 5 speed clutch with approximately 500 miles on it. he said you can put a 5 speed clutch in a 4 speed trans but can't put a 4 speed clutch in a 5 speed trans. he said reason why you can't put a 4 speed clutch in a 5 speed trans is because t/o thickness differences.
just wanting to make sure this is correct before buying. he has the matching pressure plate as well.
All Fiero clutch and pressure plates will interchange between all manual transmissions. The only thing different between transmissions is the throwout bearing. It is specific to the transmission. A 4-speed requires it's own throwout bearing. An Isuzu 5-speed requires its own throwout bearing. A Getrag 5-speed requires its own throwout bearing. You may bolt up any Fiero manual transmission to any Fiero engine.
If the 5-speed clutch you're purchasing came from a 4-cylinder, it will be a smaller diameter and may slip since the face diameter is smaller than is needed for the V6. The bolt patterns for the pressure plates are the same throughout all Fiero flywheels.
What is the specific application? Engine? Which transmission? What did the clutch come from? With that info, we could give a more specific answer.
[This message has been edited by fierofool (edited 09-24-2013).]
All pressure plates are not the same between the transmissions. For sure the pressure plates are different between the Muncy 4 speed and the Isuzu 5 speed. The hole through the fingers is a different diameter to match the bearing surface on the two different throghout bearings they use. The one with the smaller hole (Muncy) may work with the larger hole (Isuzu) but not the other way around. Larry
All pressure plates are not the same between the transmissions. For sure the pressure plates are different between the Muncy 4 speed and the Isuzu 5 speed. The hole through the fingers is a different diameter to match the bearing surface on the two different throghout bearings they use. The one with the smaller hole (Muncy) may work with the larger hole (Isuzu) but not the other way around. Larry
When I swapped from a Muncie 4-speed to an Isuzu 5-speed in my 85GT, I only swapped out the throwout bearing and left the Muncie clutch and pressure plate in the car. Never had any problems and it's 3rd owner is still running on the same setup.
When I swapped from a Muncie 4-speed to an Isuzu 5-speed in my 85GT, I only swapped out the throwout bearing and left the Muncie clutch and pressure plate in the car. Never had any problems and it's 3rd owner is still running on the same setup.
Yes, if you read my post I said that may work, but not the other way around. Larry
the clutch the guy is trying to sell me is from a getrag. he has the clutch and pressure plate both. will i be able to use thus clutch and pressure plate on my 4 speed trans? while using my 4 speed throw out bearing?
All pressure plates are not the same between the transmissions. For sure the pressure plates are different between the Muncy 4 speed and the Isuzu 5 speed. The hole through the fingers is a different diameter to match the bearing surface on the two different throghout bearings they use. The one with the smaller hole (Muncy) may work with the larger hole (Isuzu) but not the other way around. Larry
X2...U cant use a 4 speed PP in a Getrag as it will rub the inside of the trans. Ran into this issue first hand...
the clutch the guy is trying to sell me is from a getrag. he has the clutch and pressure plate both. will i be able to use thus clutch and pressure plate on my 4 speed trans? while using my 4 speed throw out bearing?
It will depend on how the throughout bearing matches up with the fingers on the pressure plate. I only know for sure about the Muncy and Isuzu because I have them sitting here. Looks like the height of the pressure plate also comes into play, so, even though lots of people say they all interchange we know it is just not true. The clutch discs are all the same (except from the 4 cyl to V6) Larry
Thanks for the correction, Larry. I always thought they were totally interchangeable because all pressure plates will bolt to all flywheels. I've read on this forum where people had scrubbing problems, but just swapped out for a different brand of clutch for the same application and resolved that problem, so I thought any interference problem was just due to the manufacturer.
I have done the Isuzu trans on a Muncie clutch set on two occasions without any problems, but I've never done the Isuzu onto the Getrag pressure plate. Thanks for the correction.
the clutch the guy is trying to sell me is from a getrag. he has the clutch and pressure plate both. will i be able to use thus clutch and pressure plate on my 4 speed trans? while using my 4 speed throw out bearing?
