[DeTomaso] Dash 1 ZF Question- Internal shift detents??? Mangusta

[zumzum at cox.net]

Steve,
What you did was to change the linkage length which resulted in you not getting enough movement in the selector shaft for 4th. What you need to do is to lengthen the overall distance, that is hard.
So what you do is this: put car in air in 4th gear with linkage removed from trans or very loose.
You need to: Put shift lever in 4th and trans in 4th!
Jiggle on selector rod while helper powers speed up and down w/ brake loading to make no sure no pop out.
Then adjust linkage to fit!!!!!
Linkage must conform to you [shift master] and trans selector shaft {shift slave}.
Remember shifter is secondary to trans selection.
Keep in mind what distance you give 4th you take from other opposite plane gears. 
Back in April I had Piero Rivolta's Varedo in my repair shop the day before he would drive it in my cruise and be in my show, doing the same issue. Loose and vague gear selector function.
It took about an hour and half of major stress and communiction with paid mechanic with good ears in car while I established correct gear selection process.
Do not trust guesses or thoughts. Do not waste time measuring. Allow the trans to tell where the adjustments need to be done.
Then you load/test all other gears for proper function.
Frustration may become your friend, so what.
This is the way I have done my Bora, Mangusta, Varedo, customer's Lotuses and others.
I hope I have helped. Remember that mounts and out of square body to engine issues will need to be addressed separately.
Jeff Cobb

---- steven.liebenow at att.net wrote:
> For any of you with Dash 1 ZF knowledge....internal workings....
>
> Do these early trans have shift rail detents on the 4-5 rail? (To assist with
> holding the trans "in gear")
>
> I can see in the ZF book where the DS-25/2 version (Dash 2) has detents on all
> three rails and lockout detents as well.
>
> For the DS-25 trans, no such detents are shown, except for the lockout detents
> which prevent you from catching two gears at the same time....
>
> During our first run in the car to Laguna Seca, we discovered that the car no
> longer likes 4th gear, under load or coasting. It NEVER complained
> prior.....but what I did do that is different, is change my linkage angles (so
> that the linkage is more "flat") by lowering the trunion a bit, and actually
> hitting it with some lube! I also lowered the engine in the front, which would
> have the result of raising the rear of the trans a bit...making the linkage even
> "more flat" in the process.
>
> There should be a detent mechanism under the shifter, but I will need to tear
> into the car some more to see if it has been removed, or is physically
> challenged for some reason presently.
>
>
> Thanks!
> Steve
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--
Jeff Cobb