Author	[Modern View]
Roger in Iowa 11-29-2012 14:21:47 166.182.3.106 Report to Moderator	I know I have read solution but cannot find it. 1970 4020 sychro, overshifts in the higher gear of the range, i.e. 3, 5, 7 and 8. All work, but just have to carefully get it in the above gears. 5, 7 and 8 worse but have learned to not shift it so far downward on these gears. Have cover off for other reasons so now is the time to fix. Thanks for help. [Reply]   [No Email]
Tim S 11-30-2012 05:21:17 68.75.23.93 Report to Moderator	Re: 4020 sychro adjustment in reply to Roger in Iowa, 11-29-2012 14:21:47   Put new bushings, clevis and pins,shims in the upper shifter to start with, the adjustments is basically centering the shifter in each gear. Also I have seen the shifter pivot pin get loose and wear the hole a bit, when this happens I pean the hole to "swell" it enough to hold the pin, then goob it up with some JB weld to fill in the void them tighten it up good and let it set for a day. This works fairly good most of the time, but only if you swell the hole first and then depend on the JB weld to finish the fit...And if this don"t solve the problem get the splitting stands out.....   [Reply]  [No Email]
tomstractorsandtoys1 11-30-2012 07:04:45 64.136.27.164 Report to Moderator	Re: 4020 sychro adjustment in reply to Tim S, 11-30-2012 05:21:17   Tim have you ever replaced the pointers behind the plugs on the side of the trans that go against the cams? We replace them with a ball and retainer like the later 4230's used,it seems to help center the cam better as many are wore bad from the pointer.We also replace the springs.   [Reply]  [No Email]
Tim S 11-30-2012 07:34:54 68.75.23.93 Report to Moderator	Re: 4020 sychro adjustment in reply to tomstractorsandtoys1, 11-30-2012 07:04:45   Yes when I re-build a transmission I include those with the parts, every little bit helps, but "most" of the time a shift problem is worn sychronizers...   [Reply]  [No Email]
Tx Jim 11-30-2012 04:19:45 67.142.163.24 Report to Moderator	Re: 4020 sychro adjustment in reply to Roger in Iowa, 11-29-2012 14:21:47   Roger is there very much side to side movement in the shift quadrants in the dash?? If so it needs to be shimmed.   [Reply]  [No Email]
Jim Knapp 11-29-2012 14:35:34 184.20.33.131 Report to Moderator	Re: 4020 sychro adjustment in reply to Roger in Iowa, 11-29-2012 14:21:47   Might just be the clevises on the shifter rods from the shifter under the dash to the transmission. Jim   [Reply]  [No Email]