Low horse power and low vehicle weight 700R understanding

Started by GPster, October 05, 2019, 09:51:37 PM

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GPster

Years ago it became apparent that the original frame under the Jeepster needed to be replaced. So many times S10 frames are suggested.  Down here in this "Rust " belt old S10 frames usually rust through around the rear end. When I was looking for a donor for a frame swap I was pleased to find a '87 GMC S15 that had an intact frame. I started to dis-assemble the vehicle in the junk yard and then the yard owner offered me the whole vehicle at a good price. So I put a battery in it and drove it out of the yard. I borrowed a truck and trailer to bring it home but I didn't trust my coordination. I had a friend drive the purchase on the borrowed trailer, unload it and park it in an out-of-the-way place behind  my garage. It ran and moved so i had no question about the engine (2.5L Iron Duke four) or the transmission (700R).During the further dis-assembly of the vehicle I noticed that the cable from the transmission to the throttle was frayed almost to the point of breaking so I replaced it  with a cable from NAPA that was adaptable to 700R applications. The transmission has new fluid and filter that I installed probably a year ago and the only movement the vehicle has seen in that time has been a drive to my neighbors garage to use his lift to pull the rear axles for some brake work. I notice the Jeepster needing a lot of throttle to move when driving it home but I thought it might be because this was the first the vehicle had moved since the trans oil and filter had been changed. Over the last couple of days I have been preparing the Jeepster to drive it to a local car show only to show everybody that I have been telling for the last 25 years that I actually have it. There has been so much talk about. the proper adjustment of that cable and how improper adjustment can burn up a transmission that I'm concerned that maybe the faulty cable has lead to the death of this one.This throttle linkage is nothing like any of the typical examples you see in an adjustment picture. This and the throttle cable hook to a nylon wheel and the rotation of that wheel drives the mechanism that turns the throttle shaft on the throttle body.That and the instructions that came with the replacement cable suggested that you adjust the new cable to the same length as the cable you are replacing. That doesn't seem like a fool proof way to replace a damaged or broken cable. I'm looking for comments and/or suggestions on what to do next. GPster

Canuck

Some super good information from a good friend to RRT at " http://purplesagetradingpost.com/sumner/techinfo/700R4p1.html ".

Used this information to modify linkage on a Holley carb and set up TV cable and do wiring changes and switches in trans.  Have lock-up release when applying brakes or on down-shift or low vacuum, same as stock GM.  Re-using it again to make a new throttle lever and set up TV cable again on a Q-Jet off a Caddy to use on my 64 Malibu.  

Some excellent reading.
My 30 Coupe build, with a Nailhead and fenders
  UPDATED JUNE 26, 2017
http://chevelle406.wordpress.com/

GPster

That information is very intense and well received but doesn't give me the information I think I need. My set-up consist of all stock components (with the exemption of the replacement cable) even the gas pedal. My vehicle is not in the condition that I would try to drive it and feel the first to second shift and try to get the transmission to shift into passing gear. My hope is that because when I changed the trans fluid and filter I didn't find any sludge or metal shavings in the bottom of the pan  that my thoughts of a problem are just something simple. GPster

Crosley.In.AZ

If the engine throttle linkage and related parts are OEM.. the TV  cable replacement   should be straight forward simple deal.  You need full pull of the TV cable at wide open throttle.

Have you verified the fluid level?

Is the fill tube and dipstick OEM to the engine & transmission too?
Tony

 Plutophobia (Fear of money)