The AMC Forum - Installing Gear Vendors Over Drive in 74 AMX
 
Welcome, Guest. Please Login.
YaBB - Yet another Bulletin Board
10/23/14 at 11:42:38
News: 07/13/2009: Member Registration is now manual. Please email me if you're looking to sign up: amcforumAThotmail.com
Home Help Search Login


Pages: 1 2 3 
Send Topic Print
Installing Gear Vendors Over Drive in 74 AMX (Read 12725 times)
AMX401
AMCrazy
**




Posts: 144
Gender: male
Edmonton, Alberta, Canada
Installing Gear Vendors Over Drive in 74 AMX
11/16/10 at 21:50:22
 
There have been so many topics on 5 speed conversions I thought I'd begin a thread on installing a GV unit in my 74 AMX.  For those who aren't familiar with GV, it is an over drive gear that can be engaged in any gear...essentially turning my 4spd into an 8spd.
 
My driveline consists of a mild 401, 2.64 T-10, and 3.54 rear end...the GV unit has a .78 ratio when engaged.
 
For starters I swapped out my pilot bushing for a roller bearing and went to the beefier late 60's bearing retainer and TO bearing.  
 
Here's a pic of the roller bearing (Sorry for the poor pics but my camera battery won't keep a charge and my wife would have a new set of door knockers if I used our good one):
 

 
Next I installed my reverse idler shaft and lever in the GV Tailshaft:
 

 
The GV supplied Thrust washer is a torrington style:
 

 
Tailshaft installed:
 

 
Top view of GV overdrive, I ground a wee bit off the ribs on both sides which gave me about 1/2" clearance from the seat crossmember:
 

 
The factory tranny crossmember needed to be cut down an inch for clearance, GV supplies a Turbo 400 tranny mount:
 

 
I felt the crossmember was a bit weak as it would bend slightly if I smacked it so welded in a couple of braces for strength:
 

 
Side view of overdrive, the speedometer cable comes right out at the lower corner of the seat crossmember and GV is sending a 90 degree which hopefully will fit...if not, then I'll have to cut about 1/2" off the corner of the crossmember:
 

 
The next pic is one GV had sent me of a Javelin installation (my camera battery died) and it shows how the adapter allows the shifter to stay in the factory position...love the fact I can keep my factory console!
 

 
Here is the unit installed, I will have to have my exhaust changed as it hits the overdrive portion:
 

 
Another view:

 
And straight on...you can see where the speedo housing is close to the crossmember, though it looks worse from this angle:
 

 
 
Once I get the 90 degree speedometer I can finish it up....need to have my driveshaft shortened roughly 13" (GV supplies a spicer yoke which will have to be mated up) then I will ensure my angles are good...the engine/tranny is raised up approximately 1/8" over the stock set up where the bell meets the tranny.  When it's up on the hoist getting the exhaust done I'll try and get more pics.
So far the modifications are minimal...the last thing I wanted to do was tunnel mods, etc.  
 
Back to top
 
 

74 Javelin AMX, 401 8 Speed
Email   IP Logged
chickenman
Forum Junkie
***


American Motors
Corporation

Posts: 543
Gender: male
Feversham, ONT
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #1 - 11/17/10 at 00:50:39
 
Thats looks great Jeff. Keep us up to date on your project. I was looking into doing this a few years ago but I didn't recall anybody making one then for a borg warner 4 sp.  . Let me know how you like it. Garry
Back to top
 
 
Email   IP Logged
AMX401
AMCrazy
**




Posts: 144
Gender: male
Edmonton, Alberta, Canada
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #2 - 11/17/10 at 02:44:32
 
Quote from chickenman on 11/17/10 at 00:50:39:
Thats looks great Jeff. Keep us up to date on your project. I was looking into doing this a few years ago but I didn't recall anybody making one then for a borg warner 4 sp.  . Let me know how you like it. Garry

 
Thanks Garry.  Interestingly enough the first time I called Gear Vendors a year ago they said they thought the Ford kit may work and I could try it and send it back if it didn't...I wasn't interested in paying the freight etc both ways so dropped the idea.  Can't recall which forum it was, but someone posted an offhand comment about having the GV in a humpster this spring or summer...I PM'd him and he said GV did the install...talked to Jeff at GV and he said they've done a few over the years, guess I spoke to the wrong person the first time.
 
Back to top
 
 

74 Javelin AMX, 401 8 Speed
Email   IP Logged
Airdrie AMX
AMCrazy
**


American Motors
Corporation

Posts: 329
Gender: male
Airdrie Alberta, Canada
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #3 - 11/17/10 at 03:20:23
 
Very nice!!! I have thought about this for a while also, I like the fact you can keep the console. I also look forward to hearing how you like it... although with this fresh dump of white stuff that may not be for a while.
 
Ivan
Back to top
 
 

Ivan C
72 amx 401 4speed (undergoing restoration)
74 base model javelin 401 4speed (original)
Email   IP Logged
AMX401
AMCrazy
**




Posts: 144
Gender: male
Edmonton, Alberta, Canada
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #4 - 11/17/10 at 06:14:08
 
Quote from Airdrie AMX on 11/17/10 at 03:20:23:
Very nice!!! I have thought about this for a while also, I like the fact you can keep the console. I also look forward to hearing how you like it... although with this fresh dump of white stuff that may not be for a while.

Ivan

 
Ya, can't wait either but the roads will have to be perfect....can't see me driving like I'm in the church parking lot.  Unfortunately I'll be in that wonderful paradise called Ft. McMurray all next week and probably won't get back at it until the beginning of December.
Back to top
 
 

74 Javelin AMX, 401 8 Speed
Email   IP Logged
AMX401
AMCrazy
**




Posts: 144
Gender: male
Edmonton, Alberta, Canada
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #5 - 11/17/10 at 15:43:49
 
Here's an interesting article in the GV literature they sent me...looks like I'm not veering too far from AMC with this mod:
 

Back to top
 
 

74 Javelin AMX, 401 8 Speed
Email   IP Logged
ken
Forum Veteran
****


The Smurf-n-ator

Posts: 2296
Gender: male
Alton, ONT
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #6 - 12/04/10 at 04:28:37
 
Wow!  Shocked
That might be good for me too! Thanks for posting this.  Wink
I have a similar setup to you. T10, 3:54, etc. Was the whole kit around $3,000?
Back to top
 
 

1970 Wild Plum Metallic Gremlin. 401/T-10, CalTrac's, 3:54 Amc-20 Rear End, Moser's.
Best E.T. 12,something sec. :-P Alias... "The Purple Helmet" in
Alton, Ontario, Canada
Email   IP Logged
FuzzFace2
Forum Veteran
****


So many parts to
buy, so little money
to buy them!

Posts: 6781
Gender: male
Stamford, CT
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #7 - 12/04/10 at 16:03:01
 
Ken you also need to ask how much longer does it make the T10 as it may not work in the short wheel base Gremlin.  At 1 point I did look into the GV setup too but not having a bolt in kit back then and too high of a first gear raito in the T10 I went with the T5, hope it was the right choice undecided
Dave ----
Back to top
 
 

75 GremlinX v8 64k 4sale
76 GremlinX i6 (sons)
70 Javelin street car 390/4sp (360/T5 now)
70 Javelin 1/4 Drag car 360/auto
Email Old Fuzz Face2   IP Logged
ken
Forum Veteran
****


The Smurf-n-ator

Posts: 2296
Gender: male
Alton, ONT
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #8 - 12/04/10 at 21:00:09
 
Quote from FuzzFace2 on 12/04/10 at 16:03:01:
Ken you also need to ask how much longer does it make the T10 as it may not work in the short wheel base Gremlin.  At 1 point I did look into the GV setup too but not having a bolt in kit back then and too high of a first gear raito in the T10 I went with the T5, hope it was the right choice undecided
Dave ----

What's wrong with a six inch driveshaft?  Grin
Any chance of an overall length for the T10 with all the goodies installed?  Cheesy
Back to top
 
 

1970 Wild Plum Metallic Gremlin. 401/T-10, CalTrac's, 3:54 Amc-20 Rear End, Moser's.
Best E.T. 12,something sec. :-P Alias... "The Purple Helmet" in
Alton, Ontario, Canada
Email   IP Logged
AMX401
AMCrazy
**




Posts: 144
Gender: male
Edmonton, Alberta, Canada
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #9 - 12/05/10 at 22:13:04
 
Quote from ken on 12/04/10 at 21:00:09:
Quote from FuzzFace2 on 12/04/10 at 16:03:01:
Ken you also need to ask how much longer does it make the T10 as it may not work in the short wheel base Gremlin.  At 1 point I did look into the GV setup too but not having a bolt in kit back then and too high of a first gear raito in the T10 I went with the T5, hope it was the right choice undecided
Dave ----

What's wrong with a six inch driveshaft?  Grin
Any chance of an overall length for the T10 with all the goodies installed?  Cheesy

 
Hey Ken.  Yes, the kit worked out to about $3,000 Cdn plus UPS charged their typical extortion which added another $240.  My evil wife has banned me from the shop and forced me to renovate the bathroom the last few weeks...I'm in heavenly Ft.  McMurray this week but hoping to get back at the Jav in a couple of weeks and I'll take some measurements, though off the top of my head it adds about 13" to the t-10.
 
I rec'd the 90degree speedometer adapter but it looks like I will have to cut or hammer a notch in the seat cross member, then get the driveshaft shortened and my exhaust modified.  Gonna take my time, we're in the boring portion of winter, not enough snow for sledding, muscle cars are in hibernation, beer freezes if guzzled too slowly...
Back to top
 
 

74 Javelin AMX, 401 8 Speed
Email   IP Logged
rambling_rebel
Forum Junkie
***




Posts: 1068
Gender: male
Fergus, Ontario
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #10 - 12/06/10 at 00:07:20
 
YOU have an evil wife TOO....sooo do I....I am just glad she hasn't figured out how to get to this weebsite
 
but seriously, theres more than just ken interested in this so keep posting....
 
rr
 
ps as for beer freezing if not guzzled....try switching to scotch  Cheesy Grin
Back to top
 
 
Email rambling_rebel_70   IP Logged
firecapt321
Forum Veteran
High Performance
****


The Ken Killer

Posts: 5571
Gender: male
Savannah, GA
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #11 - 12/06/10 at 00:24:32
 
I just can't get past the price of the OD kits....
Back to top
 
 

12.9 @ 111mph
Street Tires, Stock Stall Mopar Converter, 3.15's, Foot Lock System and Auto Zone's Finest Shocks, Crossing the line at 4000 rpm's..... lmao
Email   IP Logged
rambling_rebel
Forum Junkie
***




Posts: 1068
Gender: male
Fergus, Ontario
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #12 - 12/06/10 at 01:10:39
 
it's ok JP.....it's in Canadian tire dollars........and besides....its old skule......you wouldn't understand
 
rr
Back to top
 
 
Email rambling_rebel_70   IP Logged
AMX401
AMCrazy
**




Posts: 144
Gender: male
Edmonton, Alberta, Canada
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #13 - 12/06/10 at 02:22:20
 
Quote from firecapt321 on 12/06/10 at 00:24:32:
I just can't get past the price of the OD kits....

 
That was my first thought as well so I had decided the TKO500 would be the way to go...once I priced out the tranny, bellhousing, shifter, clutch assembly, etc the price was around the $3k range...the other negative is ripping half my tunnel off, especially seeing as how I had done the body last year and would have to rip all that sound matting out, etc.
 
I like the fact my shifter is in the stock location so I can keep my ultra cool factory 4spd console!
Back to top
 
 

74 Javelin AMX, 401 8 Speed
Email   IP Logged
AMX401
AMCrazy
**




Posts: 144
Gender: male
Edmonton, Alberta, Canada
Re: Installing Gear Vendors Over Drive in 74 AMX
Reply #14 - 12/06/10 at 02:30:32
 
Quote from rambling_rebel on 12/06/10 at 00:07:20:
YOU have an evil wife TOO....sooo do I....I am just glad she hasn't figured out how to get to this weebsite

but seriously, theres more than just ken interested in this so keep posting....

rr

ps as for beer freezing if not guzzled....try switching to scotch  Cheesy Grin

 
I can't switch to scotch...evil wife drinks scotch, drink beer cause wife won't drink it and I don't have to worry about losing track of my inventory.
Back to top
 
 

74 Javelin AMX, 401 8 Speed
Email   IP Logged
Pages: 1 2 3 
Send Topic Print