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Sun Jul 08, 2012 10:12 pm

My 71 sb would shake and hop,about 50% of the time on take off.I put a front transmisson mount in from under the car without removing engine etc. I have not tightened anything back up yet , Because The two 27mm fork horn bolts located at bottom of the car will not go back in..I can't get them started..
I search for info

It has been a few days now of trying over and over to get these 2 fork horn bolts started.
Any advise appreciated, Jack
Poteau Ok

Mon Jul 09, 2012 3:45 am

First - don't force them in. I had the same problem. I think the PO had forced them. I cleaned the bolt threads with a wire brush on a wheel and the interior threads with WD40 and the wire brush that a plumber uses to clean copper fittings. I cut the handle off and used my battery drill. The bolt would only go a short way. I would take it out and reclean the threads. It took several passes, but it is finally in. Next time, I will spend the money and buy a proper size tap from McMaster-Carr

Mon Jul 09, 2012 6:29 am

I assume that you are using a jack to support the transmission to help line stuff up PERFECTLY. Because you must get these threaded in a few turns by hand, cross threading will really ruin your week.

Some like to slowly turn such bolts by hand the opposite way slowly, until they feel a "drop", then start turning clockwise.

Mon Jul 09, 2012 6:34 am

Cusser wrote: I assume that you are using a jack to support the transmission to help line stuff up PERFECTLY. Because you must get these threaded in a few turns by hand, cross threading will really ruin your week.

MAKE SURE you have the gearbox lifted an inch or so off the frame with a floor jack.

You will need to maneuver it around fractions of an inch to get the bolts lined up right. Took me 5 minutes the other day when replacing my gearbox for the first time. Just need to eyeball the holes and line them up.

Mon Jul 09, 2012 6:34 am

18mm 1.5 pitch (what do your calipers say,, 18mm? )
tap in my hand
i had to chase mine due to PO not ever tightening them to 160ft/lbs.
you can loosen up all the bolts if the engine is out. so all parts rattle
and get those 2 in first.

there are 4 outboard rear tranny mounts nuts. loosen them
and the whole bracket floats. just loose.
now there is no side interference on these huge bolts.

if you need a source for that tap,ask,, lots of sellers...

Tue Jul 10, 2012 7:47 pm

I got it!
Thank God
Thank all of you!!!!

Jack

This forum is the best!!!!
Thank you all!!!