Borgeson box - pitman arm nut torque
#3145233
05/17/23 10:15 PM
05/17/23 10:15 PM
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Joined: Jan 2003
Posts: 1,756 Windsor, ON, Canada
Diplomat360
OP
top fuel
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OP
top fuel
Joined: Jan 2003
Posts: 1,756
Windsor, ON, Canada
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1980 Dodge Diplomat coupe here...the FSM calls for 175 ft-lbs, but the Borgeson box instructions only call for 100-120 ft-lbs...seems like a big difference, no?
I compared the old nut to the new one and the threads in the nut, as in TPI, seemed identical, so why the big difference?
For what it's worth: I put 100 ft-lbs on there right now and the rubber seal that sits between the box body and pitman arm isn't compressed yet and shows space....so it would seem like the pitman arm should still "climb" the output shaft a bit more, and that'll need more torque on the nut.
I applied anti seize to both the pitman arm splines and the box output shaft splines to make the mating go easier. The same was applied on the nut and the lock washer, so it's not like I might be seeing weird torque readings because of friction alone.
Thanks!
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Re: Borgeson box - pitman arm nut torque
[Re: Diplomat360]
#3145350
05/18/23 02:32 PM
05/18/23 02:32 PM
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Joined: Jan 2005
Posts: 4,406 Michigan
MarkZ
Worthy
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Worthy
Joined: Jan 2005
Posts: 4,406
Michigan
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Has to be a difference in torque rating between the large and small sector shaft boxes. Anyone know what that is?
1987 Fifth Avenue - 512/518/D60
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Re: Borgeson box - pitman arm nut torque
[Re: TJP]
#3145441
05/18/23 10:06 PM
05/18/23 10:06 PM
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Joined: May 2019
Posts: 6,235 nowhere
Sniper
master
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master
Joined: May 2019
Posts: 6,235
nowhere
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Unless Borgeson told you to use antisieze on the threads their torque recommendation is moot. The use of and type of lubricant used can have a profound effect on torque readings. If Borgeson did specify antisieze that can account for the difference between their recommendation and what the FSM calls for. A look at a generic torque specification chart may shed some light on this. Here's what Antisieze has to say about it https://www.antiseize.com/PDFs/torque_specifications.pdf
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Re: Borgeson box - pitman arm nut torque
[Re: Diplomat360]
#3145655
05/19/23 08:06 PM
05/19/23 08:06 PM
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Joined: Jan 2003
Posts: 1,756 Windsor, ON, Canada
Diplomat360
OP
top fuel
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OP
top fuel
Joined: Jan 2003
Posts: 1,756
Windsor, ON, Canada
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Appreciate all the comments and feedback you guys. I reached out to Brian @Borgeson this morning and asked him for advice / direction re: proper approach to this. His response is as follows: ...The tapered length of the pitman shaft on the factory gearbox vs our new design gearbox may be different resulting in the differences in torque specs to seat the pitman arm completely on the pitman shaft. The gap between the pitman arm and the dust boot is not unusual as the pitman arm will only travel so far until it seats on the taper pitman shaft...You can go ahead and use 20 more ft lbs. than the 100-120 listed in the instructions but I would not exceed 140 ft lbs...
Obviously, I am NOT sharing this as applicable to all similar inquiries, however this was his response to mine.
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Re: Borgeson box - pitman arm nut torque
[Re: Diplomat360]
#3145675
05/19/23 09:51 PM
05/19/23 09:51 PM
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Joined: Jan 2003
Posts: 15,323 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,323
Omaha Ne
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Appreciate all the comments and feedback you guys. I reached out to Brian @Borgeson this morning and asked him for advice / direction re: proper approach to this. His response is as follows: ...The tapered length of the pitman shaft on the factory gearbox vs our new design gearbox may be different resulting in the differences in torque specs to seat the pitman arm completely on the pitman shaft. The gap between the pitman arm and the dust boot is not unusual as the pitman arm will only travel so far until it seats on the taper pitman shaft...You can go ahead and use 20 more ft lbs. than the 100-120 listed in the instructions but I would not exceed 140 ft lbs...
Obviously, I am NOT sharing this as applicable to all similar inquiries, however this was his response to mine. Sounds like their typical 💩 response. Why don't they jus fix the _____ing problem. I'm surprised you didn't get the "You're the only one that's had the issue" I'll give menial credit for that. Borgeson is not the company they used to be. Good enough is now adequate. RANT OFF
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Re: Borgeson box - pitman arm nut torque
[Re: Diplomat360]
#3146190
05/22/23 02:12 PM
05/22/23 02:12 PM
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Joined: Jan 2010
Posts: 1,442 NW Chicago suburban area
Mopar Mitch
pro stock
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pro stock
Joined: Jan 2010
Posts: 1,442
NW Chicago suburban area
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Diplomat -- Could you tell IF the cross-link attachment point with the Pitman arm was now changed.... lower or higher... possibly causing an interference with the your exhaust/headers? If higher, then there would be a greater chance of interference; If lower, then there would be slightly more clearance away from the exhaust/headers.
I often wonder about the Borgenson ps box... with that described matter of linkage attachment and the results afterwards.
Mopar Mitch
"Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers!
Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
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