do i need a clutch for my fan?

mike smock · Jan 11, 2020

sorry another question, I own a 69 roadrunner that does not have a clutch fan. its bolted directly to the water pump via the pulley. my current project (another 69 rr) has a cheapo flex fan I`m looking to replace did my car come with a clutch fan? any part numbers out there for a direct mount fan, I cannot see a number on my other cars fan without taking it off! thanks for any help...….again.

also just as well add this question. I`m certain I do not have a sure grip since only one wheel turns when I turn one side, however the other side doesn't move either when I do one side, shouldn't the other side turn opposite way? don't know much about this car been sitting for 40 years. just trying to get stuff fixed before my engine gets back...……..that's another story though. I found yesterday I got a boat anchor for a block....anybody close to iowa with a 383 for a 4 speed??

Bill76 · Jan 11, 2020

I don't think my 68 RR had a fan clutch but don't remember for sure
On the rear end the drive shaft in probably turning when you turn one wheel and the other wheel isn't turning -- if the drive shaft or the opposite wheel doesn't turn when you turn one wheel you got something broke in the diff

33 IMP · Jan 11, 2020

If you go to a clutch, you will need a matching fan, they are different from a fixed fan .
As for the rear, with an open, if you lock in gear, park or in gear with a 4sp, turning one tire, the other will go the opposite direction . If the trans isn't locked, or isn't there, turning one tire will turn the pinion shaft, not the other tire. With a sure grip, assuming it's in good shape, both tires turn the same direction, and the pinion gear/driveshaft must turn too.

mike smock · Jan 11, 2020

33 IMP said:
If you go to a clutch, you will need a matching fan, they are different from a fixed fan .
As for the rear, with an open, if you lock in gear, park or in gear with a 4sp, turning one tire, the other will go the opposite direction . If the trans isn't locked, or isn't there, turning one tire will turn the pinion shaft, not the other tire. With a sure grip, assuming it's in good shape, both tires turn the same direction, and the pinion gear/driveshaft must turn too.

ah!!! trans is out makes sence now thanks any idea of a part number for a fixed fan?

33 IMP · Jan 11, 2020

Sorry, can't help there, but there are some REAL smart people here that can help. My 69 runner has a clutch, and my 62 has a cheap plastic flex fan. It eats horsepower, but it keeps 500hp cool.

Dennis H · Jan 11, 2020

There’s a thread somewhere on the Hayden Clutch Fan. The best. 2 lengths available for clearance.

440 4 speed · Jan 11, 2020

There will be many opinions. What size of rad? Our son ran his 67 383 Charger in stop and go traffic through Kansas City back in 1991. Temperature was 104F. No over heating problems.
22 inch rad that we had 3 cored.
Block had been flushed
Fan was the same as the clutch fan, but has the smaller hole. Number also ends in 216 I believe.
I can look up the number tomorrow if someone doesn’t answer today.

440 4 speed · Jan 11, 2020

Forgot 7 blade.

mike smock · Jan 11, 2020

440 4 speed said:
There will be many opinions. What size of rad? Our son ran his 67 383 Charger in stop and go traffic through Kansas City back in 1991. Temperature was 104F. No over heating problems.
22 inch rad that we had 3 cored.
Block had been flushed
Fan was the same as the clutch fan, but has the smaller hole. Number also ends in 216 I believe.
I can look up the number tomorrow if someone doesn’t answer today.

26" radiator

Ranger16 · Jan 11, 2020

No clutch on my '69 (22" radiator). No problems with it, but I would suggest a fan shroud.

moparnation74 · Jan 11, 2020

26" radiator would have the clutch fan unit....either it is a four speed, air conditioning.....

https://www.forbbodiesonly.com/mopa...gtx-restoration.127388/page-36#post-910720384

post #704

GetX'd · Jan 11, 2020

I had a clutch on my 68 GTX. Would think it the same for a 383 Bird....

mike smock · Jan 12, 2020

moparnation74 said:
26" radiator would have the clutch fan unit....either it is a four speed, air conditioning.....

https://www.forbbodiesonly.com/mopa...gtx-restoration.127388/page-36#post-910720384

post #704

has both actually! thanks

moparnation74 · Jan 12, 2020

mike smock said:
has both actually! thanks

Then there is the answer...it would have the clutch and seven blade fan.....

wyrmrider · Jan 12, 2020

and a shroud
spoiler/ valence also helps
7 blade fans are available in different pitches
also clutch fans with different length shafts
and different temp accuation
and hd vs light
and temp vs no remp-no spring
and quality vs junk

Auggie56 · Jan 15, 2020

I have a non clutch fan I'm not going to use contact me if you are interested. You will need a spacer of an unknown thickness (measure the location)
and appropriate bolts and washers.

do i need a clutch for my fan?

mike smock

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