Bus Conversions dot Com Bulletin Board
November 25, 2014, 06:59:06 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: This BB is intended for the sole purpose of sharing conversion and bus related information among visitors to our web site. These rules must be followed in order for us to continue this free exchange of info. No bad mouthing of any business or individual is permitted. Absolutely no items for sale are to be posted, except in the Spare Tire board. Interested in placing a classified or web ad, please contact our advertising dept. at 714-903-1784 or e-mail to: info@busconversions.com.

   Home   Help Forum Rules Search Calendar Login Register BCM Home Page Contact BCM  
Pages: [1]   Go Down
  Print  
Author Topic: VS2-8 transmission help  (Read 1583 times)
tanman496
Newbie
*
Offline Offline

Posts: 32





Ignore
« on: September 05, 2012, 09:32:15 PM »

My name is Mark, I bought a 1980 GMC  H8H649 about a month ago, The bus came with a manual transmission from GM someone installed a VS2-8 automatic transmission which is fine but , you have to shut the bus off to change gears from forward to revease. After looking high and low on the net noone seems to have a wiring diagram for the H8H649. I have one for a 1978 4905a bus but it dont show one with the VS2-8 trans as a option. can anyone help me wire this up , what parts will I need and where can I get them?? Thanks alot for reading Mark
Logged

Mark
tanman496
Newbie
*
Offline Offline

Posts: 32





Ignore
« Reply #1 on: September 09, 2012, 09:48:04 PM »

My name is Mark, I bought a 1980 GMC  H8H649 about a month ago, The bus came with a manual transmission from GM someone installed a VS2-8 automatic transmission which is fine but , you have to shut the bus off to change gears from forward to revease. After looking high and low on the net noone seems to have a wiring diagram for the H8H649. I have one for a 1978 4905a bus but it dont show one with the VS2-8 trans as a option. can anyone help me wire this up , what parts will I need and where can I get them?? Thanks alot for reading Mark
Logged

Mark
Scott Crosby
Full Member
***
Offline Offline

Posts: 136


WWW

Ignore
« Reply #2 on: September 10, 2012, 03:37:49 AM »

Why do you have to turn it off to switch from f-r?  Is it because it grinds and does not want to go into gear?  Has someone bypassed the neutral safety and you have to start it in gear? 
Logged

61 GM Fishbowl TDH 4516 102" 35'
1947 GM PD 3751
www.busgreasemonkey.com
Scott Crosby
Full Member
***
Offline Offline

Posts: 136


WWW

Ignore
« Reply #3 on: September 10, 2012, 03:44:41 AM »

http://brandon314.wordpress.com/2011/08/12/vh-vs-series-service-manual/
Logged

61 GM Fishbowl TDH 4516 102" 35'
1947 GM PD 3751
www.busgreasemonkey.com
tanman496
Newbie
*
Offline Offline

Posts: 32





Ignore
« Reply #4 on: September 12, 2012, 08:51:21 PM »

Yes it does grind when you try to put into gear. And yes it will start in any gear so I guess the neutral safety switch is disconnected
Logged

Mark
Scott Crosby
Full Member
***
Offline Offline

Posts: 136


WWW

Ignore
« Reply #5 on: September 13, 2012, 06:26:22 AM »

That is a common problem.  The neutral safety switch is a great work around.  I have a similar trans the VH9, you have the better looking sister trans to mine.  I start in gear to avoid the grinding.  I can switch gears from F to R once the fluid is warmed up.  But I have to do it fast.  Out and into the other gear really fast.  I've never heard of a fix for the problem other than the workaround which you already have. Loren joplin said it had something to do with a hanging clutch pack that was a GM change up that had that negative result.  I don't know about that, I was also told that it might be a few other things too.  Just don't grind the gears, if it happens stop it right away.   

If you find a fix, let me know....  I've asked, otherwise it's not to bad to live with it.  I avoid parking where I have to put it into reverse, and mostly just leave it in F 
Logged

61 GM Fishbowl TDH 4516 102" 35'
1947 GM PD 3751
www.busgreasemonkey.com
pabusnut
Sr. Member
****
Offline Offline

Posts: 323


P8M4905A-333 former MK&O lines #731




Ignore
« Reply #6 on: September 14, 2012, 06:25:10 PM »

I had a VS2-8 in my 5301 and had the same trouble.  I always started it in neutral until I had good air pressure.  Then I shut down-put in Forward, and restarted.  I could switch from F to R and back again if I did it quickly once the fluid was warmed up. 

It was never a problem for me, and some days I wish I had the Automatic in my 4905, especially when trying to back in a campsite and not slip the wet clutch!

Steve Toomey
PAbusnut
Logged

Steve Toomey
PAbusnut
tanman496
Newbie
*
Offline Offline

Posts: 32





Ignore
« Reply #7 on: September 17, 2012, 05:31:18 PM »

well someone installed this transmission but never installed all the parts that go with it , like a shift switch and all the wiring that has to be hooked up so you have backup lights. Its a real pain to have to shut it off to change gears when your trying to turn the bus around.
Logged

Mark
Scott Crosby
Full Member
***
Offline Offline

Posts: 136


WWW

Ignore
« Reply #8 on: September 17, 2012, 05:41:06 PM »

My bus a 61 GMC didn't come with back up lights or any wiring for them.  I added them myself. 
Logged

61 GM Fishbowl TDH 4516 102" 35'
1947 GM PD 3751
www.busgreasemonkey.com
buswarrior
Hero Member
*****
Offline Offline

Posts: 3571


'75 MC8 8V71 HT740




Ignore
« Reply #9 on: September 17, 2012, 09:33:12 PM »

tanman, you might want to look up Bill Gerrie over at BNO.

He knows an awful lot about these transmissions and might have a few ideas for you.

happy coaching!
buswarrior
Logged

Frozen North, Greater Toronto Area
tanman496
Newbie
*
Offline Offline

Posts: 32





Ignore
« Reply #10 on: September 18, 2012, 02:35:48 PM »

Thanks Bus warrior I never heard of BNO Who are they?? do you have a number for them?
Logged

Mark
thomasinnv
Derrick Thomas
Hero Member
*****
Offline Offline

Posts: 749


I may be nuts, but only for buses


WWW

Ignore
« Reply #11 on: September 18, 2012, 02:41:34 PM »

Thanks Bus warrior I never heard of BNO Who are they?? do you have a number for them?
BNO is "the other board"


Sent from my PantechP9070 using Tapatalk 2
Logged

There are three kinds of people in this world....those that make things happen, those that watch things happen, and those that just wonder what the heck is happening. Which one are you?

1977 MCI Crusader MC-8
8V71N/740
95% converted (they're never really done, are they?)
luvrbus
Hero Member
*****
Offline Offline

Posts: 12916




Ignore
« Reply #12 on: September 18, 2012, 02:43:15 PM »

BNO, Bus Nuts On Line a forum like this almost the same they have some great GM people there

good luck
Logged

Life is short drink the good wine first
RJ
Former Giant Greenbrier Owner
Hero Member
*****
Offline Offline

Posts: 2858





Ignore
« Reply #13 on: September 18, 2012, 07:12:32 PM »

www.busnut.com

Click on the "BNO BBS" link in the LH column.

FWIW & HTH. . .

 Wink
Logged

RJ Long
PD4106-2784 No More
S13406 Now
Fresno CA
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!