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HD7G transmission interchange
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Dozer View Drop Down
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Joined: 16 Aug 2011
Location: SW New York
Points: 689 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dozer Quote  Post ReplyReply Direct Link To This Post Topic: HD7G transmission interchange
    Posted: 13 Dec 2012 at 8:42am
Can a transmission from a HD7GB be installed in a HD7G? I have not used my HD7G for many years because it stops moving when it gets warmed up. My HD6G's have kept me busy, but I should fix the HD7G or part it out. My S/N HD7G 23776 so I have the 2nd design transmission. The HD7G has optional push start hydraulics and ground speed govenor that (according to my parts book) are not on the HD6GB P/N 70667754. The HD7G transmission with options P/N 70650554. The parts books use the same pictures so I can't tell. The part number for the case is different also.   HELP !!!

My question is do they interchange? Is there a pinion adjustment that needs to be considered when making the swap?
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gemdozer View Drop Down
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Joined: 17 Sep 2009
Points: 1004 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gemdozer Quote  Post ReplyReply Direct Link To This Post Posted: 13 Dec 2012 at 12:25pm

I am't sure but the 7GB and 7G transmission should have the same transmission and maybe the front cover use some different pieces and the torque, pump and drive shaft are't the same
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DMiller View Drop Down
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Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 33503 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 13 Dec 2012 at 3:18pm
I am curious as well as the availability of trans parts for a 7GB is better the a straight 7G
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Dozer View Drop Down
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Joined: 16 Aug 2011
Location: SW New York
Points: 689 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dozer Quote  Post ReplyReply Direct Link To This Post Posted: 14 Dec 2012 at 8:00am
My parts books say that the HD7G and HD7GB use the same gasket 70638194 between the transmission and steering clutch housing. That means that the bolts should align. However that does NOT mean that the transmissions will interchange. There are many differences as well as similarities between the 2 transmissions. Both transmissions have a 9 tooth pinion. The 7G P/N 70624560 the GB has P/N 70667743. Has anyone made the switch? Is the updated 7GB a better transmission?
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gemdozer View Drop Down
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Joined: 17 Sep 2009
Points: 1004 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gemdozer Quote  Post ReplyReply Direct Link To This Post Posted: 14 Dec 2012 at 12:09pm
The transmissions are the same and before removed your 7g transmission did you check in front transmission if the streaner is't pluged
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