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Converting 70 4 spd to auto |
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SANCAPJJ
AMC Addicted Joined: Jan/14/2009 Location: US Status: Offline Points: 934 |
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Posted: Mar/21/2019 at 8:22am |
I am working on a 70 390 Javelin - originally a 4 speed car. I have an autistic son that drives - but cannot master shifting a standard. I want to convert this car to an auto so he can possibly drive it to shows. 1 questions I have - can this be done without cutting the floor plan? I have access to a 70 390 Jav parts car that has all the auto components still in it. Though not a real concern - how would this affect the sale of this car down the road - if I keep all the original 4 speed parts to go with the car? Thanks for any help/advice welcome - JJ
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purple72Gremlin
AMC Addicted Charter Member Joined: Jul/01/2007 Location: Illinois Status: Offline Points: 16591 |
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If you change it to an automatic, Keep all the 4 spd stuff for down the road.....
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401MATCOUPE
AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5370 |
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John,
If you convert to automatic from 4 speed, both floor shift......the floor hole is slightly bigger for the shifter, but just make it fit, save the trimmed piece to be welded back in. Just but a plate on the firewall where the 4 speed push rod goes through and swap everything else over..........easy conversion. The harness already has the provisions for kick down at gas pedal and neutral safety/back up harness from console. If you run into specific problems just PM me.... Ross
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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SANCAPJJ
AMC Addicted Joined: Jan/14/2009 Location: US Status: Offline Points: 934 |
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Thanks guys - I got into the hobby because I love the cars but also to provide opportunities for my son to get additional social interaction experiences. I am excited that he is now expressing interest in his own car. I have a parts car I purchased to help with my TA restoration. I just got it painted my sons favorite color - blue. In this case Bayshore Blue. Thanks again / JJ
Edited by SANCAPJJ - Mar/21/2019 at 5:44pm |
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MK1
AMC Fan Joined: Mar/31/2019 Location: Springfield, VA Status: Offline Points: 3 |
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We converted from auto to 4 speed, seemed much easier due to leaky auto. We kept all the parts in case we wanted to go back.
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5903 |
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Boy, I'd probably want to convert it to an AMC '72 & Up Torque Command 727 or 904 or 998
BUT that would require the Bolt-In Crank Adapter and Block / Trans Spacer that can be a little hard to find... But more stuff available for the TF Trans than for the '71 and earlier AMC Borg Warner Auto Transmissions...
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purple72Gremlin
AMC Addicted Charter Member Joined: Jul/01/2007 Location: Illinois Status: Offline Points: 16591 |
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