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+--- Thread: Adding an Over Drive to a FC (/showthread.php?tid=3344)
Adding an Over Drive to a FC - Jay Darst - 09-04-2006 12:50
MikeH,
Did you add a OD box to the back of your Allison MT643?
Who makes it?
Is it a bolt in gear box?
Do you retain the drive line retarder?
With fuel so high, it would be more beneficial now than ever, to add
the Over Drive.
The guy who figures this out for the PT's with 8V92 and 4 speed
Allison, will certainly be popular.
Jay Darst
85PT40 6V92 w/MTB654CR 5-speed and needs all 5 ;~]
Adding an Over Drive to a FC - Mike Hohnstein - 09-04-2006 13:33
Call Adelmans in Canton OH, they have a web site, ask for a brownie box. It's a
in line 3 speed transmission designed to bolt mid drive shaft and provide more
ratio selection. Google for more info. Most are low direct and OD. Woody and
Randy are hip to brownie boxes and Woody has the ratio chart. My installation
left the retarder intact.
From my perspective the only thing that would make sense on a PT would be a late
model Allison upgrade or my favorite wet dream, for lack of a better term, a 13
speed OD.
I sure love the 13 in my toter.
MH
----- Original Message -----
From: Jay Darst
To: WanderlodgeForum@yahoogroups.com
Sent: Monday, September 04, 2006 7:50 PM
Subject: [WanderlodgeForum] Adding an Over Drive to a FC
MikeH,
Did you add a OD box to the back of your Allison MT643?
Who makes it?
Is it a bolt in gear box?
Do you retain the drive line retarder?
With fuel so high, it would be more beneficial now than ever, to add
the Over Drive.
The guy who figures this out for the PT's with 8V92 and 4 speed
Allison, will certainly be popular.
Jay Darst
85PT40 6V92 w/MTB654CR 5-speed and needs all 5 ;~]
[Non-text portions of this message have been removed]
Adding an Over Drive to a FC - Curt Sprenger - 09-04-2006 16:44
Mike,
Please provide with us a ball park cost to buy and install the
transmissions you mention.
Curt Sprenger 1987 PT38, Anaheim Hills, Calif.
Mike Hohnstein wrote:
> Call Adelmans in Canton OH, they have a web site, ask for a brownie
> box. It's a in line 3 speed transmission designed to bolt mid drive
> shaft and provide more ratio selection. Google for more info. Most are
> low direct and OD. Woody and Randy are hip to brownie boxes and Woody
> has the ratio chart. My installation left the retarder intact.
> >From my perspective the only thing that would make sense on a PT
> would be a late model Allison upgrade or my favorite wet dream, for
> lack of a better term, a 13 speed OD.
> I sure love the 13 in my toter.
> MH
> ----- Original Message -----
> From: Jay Darst
> To: WanderlodgeForum@yahoogroups.com
>
> Sent: Monday, September 04, 2006 7:50 PM
> Subject: [WanderlodgeForum] Adding an Over Drive to a FC
>
> MikeH,
>
> Did you add a OD box to the back of your Allison MT643?
>
> Who makes it?
>
> Is it a bolt in gear box?
>
> Do you retain the drive line retarder?
>
> With fuel so high, it would be more beneficial now than ever, to add
> the Over Drive.
>
> The guy who figures this out for the PT's with 8V92 and 4 speed
> Allison, will certainly be popular.
>
> Jay Darst
> 85PT40 6V92 w/MTB654CR 5-speed and needs all 5 ;~]
>
> [Non-text portions of this message have been removed]
>
>
Adding an Over Drive to a FC - Mike Hohnstein - 09-04-2006 23:59
In my shop, around 3 grand to hang such a device in a FC. The drive shaft mods
require careful measuring and there is the issue of getting the height and
angles correct so the finished product is smooth on the road. Of course the
trans needs to be isolated from the frame to cancle out drive line vibrations,
that is a little involved. I chose to ad a new air dryer at the time I did the
OD installation, not much room under there. It's a damn shame BB chose a diff
you can't get a two speed carrier for. In the late 80s Monaco offered medium
duty drive trains with 643 Allison and two speed diff.
MH
----- Original Message -----
From: Curt Sprenger
To: WanderlodgeForum@yahoogroups.com
Sent: Monday, September 04, 2006 11:44 PM
Subject: Re: [WanderlodgeForum] Adding an Over Drive to a FC
Mike,
Please provide with us a ball park cost to buy and install the
transmissions you mention.
Curt Sprenger 1987 PT38, Anaheim Hills, Calif.
Mike Hohnstein wrote:
> Call Adelmans in Canton OH, they have a web site, ask for a brownie
> box. It's a in line 3 speed transmission designed to bolt mid drive
> shaft and provide more ratio selection. Google for more info. Most are
> low direct and OD. Woody and Randy are hip to brownie boxes and Woody
> has the ratio chart. My installation left the retarder intact.
> >From my perspective the only thing that would make sense on a PT
> would be a late model Allison upgrade or my favorite wet dream, for
> lack of a better term, a 13 speed OD.
> I sure love the 13 in my toter.
> MH
> ----- Original Message -----
> From: Jay Darst
> To: WanderlodgeForum@yahoogroups.com
>
> Sent: Monday, September 04, 2006 7:50 PM
> Subject: [WanderlodgeForum] Adding an Over Drive to a FC
>
> MikeH,
>
> Did you add a OD box to the back of your Allison MT643?
>
> Who makes it?
>
> Is it a bolt in gear box?
>
> Do you retain the drive line retarder?
>
> With fuel so high, it would be more beneficial now than ever, to add
> the Over Drive.
>
> The guy who figures this out for the PT's with 8V92 and 4 speed
> Allison, will certainly be popular.
>
> Jay Darst
> 85PT40 6V92 w/MTB654CR 5-speed and needs all 5 ;~]
>
> [Non-text portions of this message have been removed]
>
>
[Non-text portions of this message have been removed]