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Drive Shaft
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Supporting Member of Barthmobile.com 6/12
Formally known as "Humbojb"
Picture of Jim and Tere
posted
Our 89 25' Regal has a split drive shaft. The front half is about 4" diameter and the rear half is about 3 3/4" diameter. Is that normal to have the two sections two different diameters?

J


Jim and TereJim and Tere

1985 Regal
29' Chevy 454 P32
8411 3172 29FP3B
Gear Vendor 6 Speed Tranny
 
Posts: 3832 | Location: madisonville tn usa | Member Since: 02-19-2005Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 1/21
Picture of Steve VW
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This was from my crankshaft job a while back on the 33 Regal:



Close inspection shows the front is slightly larger? Are your shafts the same length? Longer shafts would likely be larger in diameter. I would assume your shafts are OEM. As long as they are balanced I don't think diameter is very important.


9708-M0037-37MM-01
"98" Monarch 37
Spartan MM, 6 spd Allison
Cummins 8.3 300 hp
 
Posts: 4481 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 1/21
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Well I assume you will be taking it to the drag strip so the larger diameter is what you want to handle all that additional horsepower!!

Just funning!!!

Did Barth use the same wheelbase for all its P30 coaches?


25 Ft Glassnose, 2792, 1982
454 Engine
Plain Jane Interior
Original Paint
Picture by Kevin
 
Posts: 1456 | Location: Clinton Iowa | Member Since: 04-02-2017Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
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Many wb on p30's 125,137 159,178 and newer 1988 up with 190, 208 and 228. My 1986 as a modified a 178" that has been extended to 192". you can see the welds on frame and exhaust. Jim and Tera Old Blue had extended to 1925" also.


1986 31' Regal -1976 Class C
454/T400 P30 -350/T400 G30
twin cntr beds - 21' rear bath
 
Posts: 966 | Location: Dayton, Ohio | Member Since: 09-27-2009Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 6/12
Formally known as "Humbojb"
Picture of Jim and Tere
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The 25'er, who I want to call Bert in honor of my dad but have been overruled, has a 158"wheel base. The 28'ers I think 172" was standard. Some 28'ers, notably Old Blue, had a 192" wheelbase.


Jim and TereJim and Tere

1985 Regal
29' Chevy 454 P32
8411 3172 29FP3B
Gear Vendor 6 Speed Tranny
 
Posts: 3832 | Location: madisonville tn usa | Member Since: 02-19-2005Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 6/12
Formally known as "Humbojb"
Picture of Jim and Tere
posted Hide Post
rear drive shaft shot

knoxville driveline
balance test
rear tubing
2 yokes
2 welds

3 u-joints
carrier bearing
rebalance
$482


Jim and TereJim and Tere

1985 Regal
29' Chevy 454 P32
8411 3172 29FP3B
Gear Vendor 6 Speed Tranny
 
Posts: 3832 | Location: madisonville tn usa | Member Since: 02-19-2005Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 6/12
Formally known as "Humbojb"
Picture of Jim and Tere
posted Hide Post
This is Tere:
Just took Old Bert out for a test drive after installing the newly balanced drive shafts, new rear tubing, new center wheel bearing & 3 new universal joints. What a difference!! Like night & day.

Yay!!


Jim and TereJim and Tere

1985 Regal
29' Chevy 454 P32
8411 3172 29FP3B
Gear Vendor 6 Speed Tranny
 
Posts: 3832 | Location: madisonville tn usa | Member Since: 02-19-2005Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 1/21
Picture of Steve VW
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Looks like you found the problem! Not cheap but considering the number of parts, labor, balancing and the satisfactory result probably not too bad. Good thing you got it before anything let go, they can do a lot of damage if they come loose underway.

Now you're ready for hole shots at the drag strip! In plenty of time to join us in MN or MI this summer. Thumbs Up Tooling Along

Have Barth, will travel Tooling Along


9708-M0037-37MM-01
"98" Monarch 37
Spartan MM, 6 spd Allison
Cummins 8.3 300 hp
 
Posts: 4481 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 5/10
Picture of Marvin+Doris
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cheers


1999 Bluebird Custom 33' 8.3 Cummins diesel pusher

Former owner 1989 Barth Regal 25'


 
Posts: 1364 | Location: Big South Fork TN | Member Since: 09-29-2009Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 6/12
Formally known as "Humbojb"
Picture of Jim and Tere
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Yes,
Well worth what was spent. No regrets! Hoping to travel north this summer.
Tere


Jim and TereJim and Tere

1985 Regal
29' Chevy 454 P32
8411 3172 29FP3B
Gear Vendor 6 Speed Tranny
 
Posts: 3832 | Location: madisonville tn usa | Member Since: 02-19-2005Reply With QuoteReport This Post
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