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> Synchro in 1st gear?
Gatornapper
post Nov 23 2021, 07:08 AM
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Please forgive me in advance for asking a stupid question:

Did the new/original 914 tranny have synchro in 1st gear? Got mine with 60k original miles and it did not, nor have I ever driven one that did have a synchro 1st.

But somewhere I read something that said synchro in 1st went out quickly - and then synchro in 2nd would go out.

I have no synchro in 1st, but if it existed originally, that alone wouid be worth my rebuilding the tranny. Maybe Dr. Evil will do another one of his rebuild sessions at Scotty Burnett's?

Synchro in 2nd has a mind of its own. 1st to 2nd - it works 60% of the time fine. 30%, I get a tiny crunch. 10%, I get a bad crunch. Tried everything - nothing I do seems to affect whether it will crunch or not.

Downshifts into 2nd are another thing. 60% of the time, downshifts are perfect. Like a new tranny. 40% of the time, they are a horrible crunch. No idea why. Yes - clutch pressed all the way down.

No problems with any other synchros, tho 3rd, coming from 2nd, takes some additional physical effort to get into gear for some reason.

TIA,

GN
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Superhawk996
post Nov 23 2021, 07:46 AM
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Many of these transmissions are well past their prime, not properly adjusted, and abused from wanna be racers trying to speed shift them.

Side shift or Tail Shift makes a big difference in shift quality. There was a reason the design changed. Even with a side shift, 914 transmission isn't up to modern standards with long throws and lacks detent precision. Shift technique has a lot to do with gear clash. Even with good syncros, trying to shift fast and not giving the synchro's time to equalize gear shaft speeds will result in clash, and will wear out the synchro's even faster and the reoccuring gear clash rounds off the gear dog teeth futher compounding problems.

Verify all shift rod bushings are in good shape and shift rods are properly adjusted.

Firewall bushing
Trans shift housing guide bushing
Bushing cup (sideshift) - at end of shift rod.
The shift rod coupler at firewall needs to be in good shape too, with proper conical fastener, and tight.

Takes time to get shift linkages aligned properly but makes a massive difference.
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Gatornapper
post Nov 23 2021, 08:04 AM
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Thank you. I replaced all shift linkage bushings long ago, even improved on linkage by doing special things to reduce slop. RickB45 says my car shifts much better than his '72 that also has all new bushings. Rods are adjusted about as perfectly as they can and car shifts like new I am told by other 914 owners who have driven it. Linkage is VERY tight.

All bushings were shot when I got the car. One at firewall was completely destroyed.

Having been a precision driver for over 50 years (friend who tracks/races his Porsches rode with me - "Where did you go to driving school?"). I never try to speed shift a Porsche. I do precise shifts always waiting on the synchronizers.

With any manual transmission, I first familiarize myself with the tranny itself and learn its ways, always focusing on slow, precise shifts.

Problem is not in my linkage or my shifting. It is in the tranny.

BTW, for me, my goal is always the perfect shift, in every shift. Like a golfer always seeking the perfect swing, the perfect sweet connection with the club head and the ball. i focus on precision - not on speed.

When I told my Porsche dealer about buying my 914 in 2017, the service guy said, "Oh! I remember that car! We don't service many 914's....... I has a bad synchro in 2nd gear, right?"

He never mentioned 1st gear, but it's never had synchro in 1st.

GN

QUOTE(Superhawk996 @ Nov 23 2021, 08:46 AM) *

Many of these transmissions are well past their prime, not properly adjusted, and abused from wanna be racers trying to speed shift them.

Side shift or Tail Shift makes a big difference in shift quality. There was a reason the design changed. Even with a side shift, 914 transmission isn't up to modern standards with long throws and lacks detent precision. Shift technique has a lot to do with gear clash. Even with good syncros, trying to shift fast and not giving the synchro's time to equalize gear shaft speeds will result in clash, and will wear out the synchro's even faster.

Verify all shift rod bushings are in good shape and shift rods are properly adjusted.

Firewall bushing
Trans shift housing guide bushing
Bushing cup (sideshift) - at end of shift rod.
The shift rod coupler at firewall needs to be in good shape too, with proper conical fastener, and tight.

Takes time to get shift linkages aligned properly but makes a massive difference.

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Posts in this topic
Gatornapper   Synchro in 1st gear?   Nov 23 2021, 07:08 AM
Shivers   "The 901 transmission has a synchro-mesh mech...   Nov 23 2021, 07:34 AM
Gatornapper   Wow. over 4 years as a 914'er and no one ever...   Nov 23 2021, 07:48 AM
Superhawk996   As I grew up driving stick with no synchro in 1st...   Nov 23 2021, 08:10 AM
Gatornapper   I am usually in neutral at stoplights. I rarely s...   Nov 23 2021, 08:24 AM
Superhawk996   I am usually in neutral at stoplights. I rarely ...   Nov 23 2021, 08:45 AM
Gatornapper   SH - Known all these for many years, and I'm ...   Nov 23 2021, 11:35 AM
Superhawk996   Many of these transmissions are well past their pr...   Nov 23 2021, 07:46 AM
Gatornapper   Thank you. I replaced all shift linkage bushings ...   Nov 23 2021, 08:04 AM
BeatNavy   S'Hawk is much more experienced here than most...   Nov 23 2021, 08:49 AM
Gatornapper   Thanks Rob. Best thing for me would be to go to D...   Nov 23 2021, 11:39 AM
DRPHIL914   i get the habit of sitting in neutral, like you, m...   Nov 23 2021, 12:03 PM
Gatornapper   Phil - Wow. If you were at Scotty's a few ye...   Nov 23 2021, 08:52 PM
rfinegan   I just rebuild My #1 pack on my 901 here: http://w...   Nov 23 2021, 08:58 AM
Gatornapper   Thanks Robert! Now you've got me interest...   Nov 24 2021, 09:37 AM
Wew   Second the Dr. Evil DVD. I did my rebuild last ...   Nov 23 2021, 11:54 AM
Gatornapper   Thanks Gary - good advice. But won't be happe...   Nov 23 2021, 08:39 PM
Rand   Third to first. It will help you. It's like th...   Nov 23 2021, 08:48 PM
Rand   Third to first. It will help you. It's like th...   Nov 23 2021, 08:48 PM
Gatornapper   Rand - GREAT IDEA! Will do! Will try to...   Nov 24 2021, 09:29 AM
flyer86d   When we had our 71 914, we eventually lost 1st gea...   Nov 24 2021, 03:05 PM
Gatornapper   Charlie - Please quit reading my mind. I was thi...   Nov 24 2021, 07:53 PM
Gatornapper   Can anyone answer Charlie's question in Post #...   Nov 26 2021, 11:57 AM
DRPHIL914   Can anyone answer Charlie's question in Post ...   Nov 27 2021, 09:11 AM
Rand   And third to first? Yes, much nicer. You do need ...   Nov 26 2021, 09:12 PM
Gatornapper   Rand - I cannot imagine my linkage being any tigh...   Nov 27 2021, 09:14 AM
Shivers   Easy answer is yes. The whole cluster and intermit...   Nov 27 2021, 09:23 AM
Gatornapper   Shivers - Older = wiser. At least a bit. You so...   Nov 27 2021, 08:14 PM


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