Drivetrain shutter

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Maxod
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Drivetrain shutter

Post by Maxod »

This is weird...and I'm hoping someone has experienced the same thing. I have a shutter that I can feel on the gas pedal and gear shifter when I start from a standing stop. It is more pronounced on hard takeoffs and is almost non existent when I drive away slowly. I have a 70 F250 4x4 highboy with a NP 435 tranmission and a dana 24 transfer case. Both units have been rebuilt recently, but the shutter still exists. I have been thinking that the pinion bearing might be bad, (I have a dana 60 rear) but a friend said the nature of the dana 24 without a support bracket makes it move around when pulling or hauling. I was thinking about changing the insulators on the transfer case to see if the shutter subsides or lessens. Anyone have a thought on this problem.

Dave
70 F250 Highboy 4x4
67 Mustang Fastback S code GT
64 Ranchero 302/4spd

"Wisdom is the ability to see the absurdity in our past decisions and applying that understanding to future decisions..."

I used to own a Chevy.
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averagef250
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Post by averagef250 »

You're friend's absolutely right. Go with polyurathane T-case mounts. Jeff's bronco graveyard sells them. That should solve your problem. If not, the dana 24 does not take well to adding a strut (there's no good place to mount it). Instead of fooling with a strut on the 24 it's easier and more econimical to swap to a 205 case for which the factory strut rods are plentiful and work great.
1970 F-250 4x4 original Willock swivel frame chassis '93 5.9 Cummins/Getrag/NP205/HP60/D70
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jeepermc
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Post by jeepermc »

I get a shudder from Spring wrap...... Also check all u-joints...
1952 CJ-3A- 289cid, NP435
1969 F-250 4X4- 410cid, NP435, Dana 24-44-60LS , 4", 36's
1975 F-250-Ranger XLT 4X4- 390cid, NP435, NP205, 44F, 60 rear
1987 Mustang GT
New addition- 1997 F-350 PSD std. cab 4x4

I really have a problem...............
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Post by heep70 »

averagef250 wrote:You're friend's absolutely right. Go with polyurathane T-case mounts. Jeff's bronco graveyard sells them. That should solve your problem. If not, the dana 24 does not take well to adding a strut (there's no good place to mount it). Instead of fooling with a strut on the 24 it's easier and more econimical to swap to a 205 case for which the factory strut rods are plentiful and work great.
Didn't some D24s come stock with a strut :hmm: I have seen a few with them on. My neighbor has one on his 73 F250. It is stock because he doens't modify his stuff. They mount them on the bottom plate on the Tcase.
Greg

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Maxod
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re: Drivetrain shutter

Post by Maxod »

Dustin,

You are the man...you were dead on with the bushings...I ordered the polyurethane bushings from Jeff's Bronco Graveyard. I installed them today. The shutter is gone and the drive train is absolutely vibration free. Please take a gold star out of petty cash for your advice. Thanks a bunch.

Dave
70 F250 Highboy 4x4
67 Mustang Fastback S code GT
64 Ranchero 302/4spd

"Wisdom is the ability to see the absurdity in our past decisions and applying that understanding to future decisions..."

I used to own a Chevy.
ptodave
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re: Drivetrain shutter

Post by ptodave »

How much for the poly bushings?
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72 F-250 390, NP435, Dana 24, D60, 14b, 4.88s, detroits, 2 winches, 4x4 40" tires.
Maxod
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re: Drivetrain shutter

Post by Maxod »

The insultators (bushings) were $48.00. Jeffs shipped them in about 4 days to California. They are polyurethane and work much better than stock. I was able to install them without dropping any of the driveshafts or pulling the transfer case out completely. It was a trick my wife refers to as a McGyver move. Took about two hours total. Well worth the price and effort.
70 F250 Highboy 4x4
67 Mustang Fastback S code GT
64 Ranchero 302/4spd

"Wisdom is the ability to see the absurdity in our past decisions and applying that understanding to future decisions..."

I used to own a Chevy.
ptodave
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re: Drivetrain shutter

Post by ptodave »

Thanks for the info. Seems like you like them,and the price is good. Probably order me a set,again thanks.PTO. :thup:
Engage Brain BEFORE Engaging Gears
72 F-250 390, NP435, Dana 24, D60, 14b, 4.88s, detroits, 2 winches, 4x4 40" tires.
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460 crew
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Post by 460 crew »

I have the poly's on my 70 with the 205 and a 460 not running a strut brace yet for 3 yrs and no complaints out off the drivetrain. Well worth the money.
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jeepermc
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Post by jeepermc »

Is that Part # 23094?
1952 CJ-3A- 289cid, NP435
1969 F-250 4X4- 410cid, NP435, Dana 24-44-60LS , 4", 36's
1975 F-250-Ranger XLT 4X4- 390cid, NP435, NP205, 44F, 60 rear
1987 Mustang GT
New addition- 1997 F-350 PSD std. cab 4x4

I really have a problem...............
Maxod
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re: Drivetrain shutter

Post by Maxod »

Transfer Case Mounts, Black
# 23094
New
1968-75 Ford F-250
Black
Price: $48.00

Yup

Dave
70 F250 Highboy 4x4
67 Mustang Fastback S code GT
64 Ranchero 302/4spd

"Wisdom is the ability to see the absurdity in our past decisions and applying that understanding to future decisions..."

I used to own a Chevy.
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jeepermc
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Post by jeepermc »

Thanks. I think I'll order some up too. I'm sure mine are vintage 69..
1952 CJ-3A- 289cid, NP435
1969 F-250 4X4- 410cid, NP435, Dana 24-44-60LS , 4", 36's
1975 F-250-Ranger XLT 4X4- 390cid, NP435, NP205, 44F, 60 rear
1987 Mustang GT
New addition- 1997 F-350 PSD std. cab 4x4

I really have a problem...............
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averagef250
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Post by averagef250 »

Glad it worked! Don't know for 100% sure about the T-case strut on those 24's Greg. I've seen a few trucks with some homeade strut thing, but nothing factory. I fooled with a strut for the 24 in my truck for years. The only place to mount it was off the PTO cover and it didn't work so hot. After I burned up my 3rd 24 case, I switched a 205 in and added the factory strut. Works great!
1970 F-250 4x4 original Willock swivel frame chassis '93 5.9 Cummins/Getrag/NP205/HP60/D70
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jeepermc
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Post by jeepermc »

averagef250 wrote:Glad it worked! Don't know for 100% sure about the T-case strut on those 24's Greg. I've seen a few trucks with some homeade strut thing, but nothing factory. I fooled with a strut for the 24 in my truck for years. The only place to mount it was off the PTO cover and it didn't work so hot. After I burned up my 3rd 24 case, I switched a 205 in and added the factory strut. Works great!
How on earth did you burn up 3 D24's? Been beatin on mine for over 10 years with no probs... Don't have a strut on it either but would like to come up with somethin eventually...

Lightbulb just lit..... The 75 has been eatin center u-joints lately. Wonder if the bushings for the 205 are shot too......It came with a 24 and I swapped in a 205....
1952 CJ-3A- 289cid, NP435
1969 F-250 4X4- 410cid, NP435, Dana 24-44-60LS , 4", 36's
1975 F-250-Ranger XLT 4X4- 390cid, NP435, NP205, 44F, 60 rear
1987 Mustang GT
New addition- 1997 F-350 PSD std. cab 4x4

I really have a problem...............
TRMMULLET
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re: Drivetrain shutter

Post by TRMMULLET »

I had the same problem with te rubber style insulators. They like to rip out when you drag the T-case :thup: I was wondering if they made the poly bushings and this site again answers any questions I may have :fr:
68 f250 "highboy" frame
67 np435 trans
68 dana 24 t case
67 dana 60 rear w/track loc
76 dana 44.6cf front w/DPC and heavy duty hubs
70 ford body w/rust incuded!!!
R.I.P. the 87 subaru GL wagon "the traildancer"
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