HarleyTechTalk

Technical Forums => Shovel Head => Topic started by: JamLazyAss on September 03, 2021, 05:52:19 PM

Title: Transmission Swap
Post by: JamLazyAss on September 03, 2021, 05:52:19 PM
Just wondering...

Got a 1984 Shovelhead with the rotary top transmission.
Other than the obvious things like linkage, what would be required to replace it with a ratchet top transmission?
Title: Re: Transmission Swap
Post by: kd on September 03, 2021, 07:40:28 PM
I could be wrong but I believe the 1970 and up into the early evo's is the same gearbox with different controls as you mention.  The early pre ratchet (jockey) lids fit. The speedometer ratio may be different but I only remember a couple rates of speedo gear sets. The course and fine.
Title: Re: Transmission Swap
Post by: Burnout on September 04, 2021, 09:36:36 AM
As far as I see any problems with a cow pie trans is the external linkage. There are new arms made that eliminate most of the slop.

Ratchet tops are fiddly and can be troublesome to get right.
Title: Re: Transmission Swap
Post by: billbuilds on September 06, 2021, 03:11:12 AM
Quote from: Burnout on September 04, 2021, 09:36:36 AM
As far as I see any problems with a cow pie trans is the external linkage. There are new arms made that eliminate most of the slop.

Ratchet tops are fiddly and can be troublesome to get right.
[/color]                     
                                                          :scratch:


     Jam, Forward controls or midshift? Tranny itself would be a straight swap. If forward controls you'd simpy need a 33851-52 shifter arm.
Title: Re: Transmission Swap
Post by: JW113 on September 06, 2021, 09:19:56 AM
I think he may mean getting the shifter forks aligned and spaced correctly to the drum?

-JW
Title: Re: Transmission Swap
Post by: JamLazyAss on September 06, 2021, 11:24:36 AM
Quote from: billbuilds on September 06, 2021, 03:11:12 AM
Quote from: Burnout on September 04, 2021, 09:36:36 AM
As far as I see any problems with a cow pie trans is the external linkage. There are new arms made that eliminate most of the slop.

Ratchet tops are fiddly and can be troublesome to get right.
[/color]                     
                                                          :scratch:


     Jam, Forward controls or midshift? Tranny itself would be a straight swap. If forward controls you'd simpy need a 33851-52 shifter arm.
This is what I was thinking.
Forward controls.
Thank you.