Author Topic: downshifting from 5th to 4th (Read 11631 times)

1KULSOL · « **on:** October 05, 2009, 03:04:46 PM »

I was out yesterday looking at some roads to arrange a run on and all of a sudden I couldn't downshift from 5th to 4th .... and
I wasn't hauling a$$ .... I can go up thru the gears no problem and can even go down the gears when sitting still .... but nothing from 5th to 4th .... any ideas???

DeepBlueGXP · « **Reply #1 on:** October 05, 2009, 04:33:31 PM »

I think Dave/Randy may have seen this before.

Critterman · « **Reply #2 on:** October 05, 2009, 05:00:04 PM »

Can you downshift to any other gear, like 3rd?

1KULSOL · « **Reply #3 on:** October 05, 2009, 05:51:06 PM »

Quote from: Critterman on October 05, 2009, 05:00:04 PM

Can you downshift to any other gear, like 3rd?

yup

Critterman · « **Reply #4 on:** October 05, 2009, 08:10:25 PM »

Okay does it go to neutral?

1KULSOL · « **Reply #5 on:** October 05, 2009, 08:17:59 PM »

Quote from: Critterman on October 05, 2009, 08:10:25 PM

Okay does it go to neutral?

yup

Critterman · « **Reply #6 on:** October 05, 2009, 08:20:13 PM »

Can you double clutch into 4th?

1KULSOL · « **Reply #7 on:** October 05, 2009, 10:14:07 PM »

Quote from: Critterman on October 05, 2009, 08:20:13 PM

Can you double clutch into 4th?

didn't try that ... will try when I get home from work tomorrow ... but really that is a workaround ... I shouldn't have to do that .... something must be causing this to happen since I have had no problems before .... but it has been about 1,500 miles since I put in the new clutch ...

kennysabarese · « **Reply #8 on:** October 06, 2009, 10:21:27 AM »

He's not saying that would be a workaround. just trying to figure out the issue

1KULSOL · « **Reply #9 on:** October 06, 2009, 03:29:07 PM »

after talking to a few people I am going to change out my transmission fluid (+/- 2 1/2 qts) plus add about 6 ozs of zMAX to the AMSOIL ...

AMSOIL Synthetic Manual Transmission and Transaxle Gear Lube 75W-90 (MTG)

1KULSOL · « **Reply #10 on:** October 06, 2009, 06:48:14 PM »

Quote from: Critterman on October 05, 2009, 08:20:13 PM

Can you double clutch into 4th?

I took her out for a spin this evening ... and yes ... I can double clutch into 4th ... no problem ... all other gears are fine and easily go into place with no trouble ... it's just the 5th to 4th where the problem occurs.

Code: [Select]

He's not saying that would be a workaround. just trying to figure out the issue
sorry if it came off that I didn't appreciate the advice ... because I do ... ALL help is gratefully appreciated

Uranium-238 · « **Reply #11 on:** October 06, 2009, 07:08:40 PM »

Bad syncro?

Critterman · « **Reply #12 on:** October 06, 2009, 08:12:55 PM »

That is what I was thinking and trying to find out. That would be my first guess, next would be a shifting arm

1LILNDN · « **Reply #13 on:** October 06, 2009, 10:08:25 PM »

I know sometimes I pull back to down shift to 4th and feels like I hit a flat spot just now and than.I think its hitting between somewhere cause if I move the stick to the right it goes rite in . Like I'm trying to go into 2nd and it won't let me . I always double shift through all gears 2nd,3rd,4th and 5th seems like it goes into gear smoother.

KWhale · « **Reply #14 on:** October 07, 2009, 12:54:28 AM »

What is double shifting?

Arabas · « **Reply #15 on:** October 07, 2009, 04:02:22 AM »

Quote from: KWhale on October 07, 2009, 12:54:28 AM

What is double shifting?

step on the clutch once to shift from one gear to neutral, let it off and thenstep on it again to shift from neutral to the gear you chose. this must be done when tha car/truck doesn t have a syncro, that s why people here believe it might be a problem of the syncro. when i was at the navy, i was a truck and bus driver, and all of the vehicles needed double clutch. until u get used to it, it feels kind of funny as a procedure..

1KULSOL · « **Reply #16 on:** October 07, 2009, 02:29:27 PM »

I just received this from a gentleman at Royal Purple:

From: David Canitz <DCanitz@royalpurple.com>

Date: Wed, 7 Oct 2009 08:08:34 -0500
Subject: RE: 2006 Pontiac Solstice manual transmission fluid

Mike,

The manual transmission in your Solstice actually recommends an API GL3 75W90.
This is actually equivalent to a 10W40 Motor Oil - not a common EP gear oil used in differentials.

We recommend using the RP 10W40 Motor Oil part # 01140 or the RP XPR 10W40 part # 01041.

I'm not sure that you are going to solve your single gear shifting problems as this sounds more like a nicked synchronizer not allowing the proper spin up of the 4th gear hub for a synchronized shift.

You've stated that the transmission easily shifts into all gears with the engine running and the clutch depressed while stopped at a traffic light.
This verifies that the linkage is working properly and that the clutch is being properly released to stop the rotation of the input shaft on the transmission.

Being able to shift 5 to 3 also verifies that the clutch is working properly.

However, not being able to shift from 5 to 4 and I'm assuming a slightly harder shift from 3-4 - I'm thinking the problem is in the actual 4th gear synchronizer.

It may not require anything more than improving the surface contact / mating of the 4th gear synchronizer to 4th gear hub face so that the shifting improves.
The might require disassembly of the transmission to perform this if the RP 10W40 Motor Oil does not improve this.

Going to a slightly lighter viscosity oil might also allow this to improve - such as the RP XPR 5W30 Motor Oil part # 01021. Takes 2.75 quarts for your transmission.

Thanks for the email and for considering RP for your manual transmission.

David

David Canitz
Tech Services
Royal Purple Inc.
1 Royal Purple lane
Porter, TX 77365

Critterman · « **Reply #17 on:** October 07, 2009, 03:19:32 PM »

See Kul, I wasn't that far off in my long distance diagnostics work

1KULSOL · « **Reply #18 on:** October 07, 2009, 07:53:54 PM »

Quote from: Critterman on October 07, 2009, 03:19:32 PM

See Kul, I wasn't that far off in my long distance diagnostics work

ya did good

1KULSOL · « **Reply #19 on:** October 08, 2009, 05:52:31 PM »

ok ... I changed the oil and added the zMAX .... the old oil was very clean ... drained it over some filter paper ... no shavings ... don't notice any difference but I will drive it for a couple of days and see if it improves .... if it doesn't

... I'll have to have it torn down and see what we find.

GaryH · « **Reply #20 on:** March 18, 2010, 09:50:41 PM »

Quote from: 1KULSOL on October 08, 2009, 05:52:31 PM

ok ... I changed the oil and added the zMAX .... the old oil was very clean ... drained it over some filter paper ... no shavings ... don't notice any difference but I will drive it for a couple of days and see if it improves .... if it doesn't ... I'll have to have it torn down and see what we find.

I hope that helps. But, I'm betting that it's a bad synchronizer.

Critterman · « **Reply #21 on:** March 19, 2010, 09:58:24 AM »

How about an update on this issue?

SolNut · « **Reply #22 on:** March 19, 2010, 03:43:04 PM »

I believe that Dave & Randy swapped in a Sky xmission they had in the shop when Mike was in for an Upgrade.

Steve

snaponbob · « **Reply #23 on:** March 19, 2010, 04:44:19 PM »

Quote from: SolNut on March 19, 2010, 03:43:04 PM

I believe that Dave & Randy swapped in a Sky xmission they had in the shop when Mike was in for an Upgrade.

Steve

If so, he got a far better set of gear ratios in THAT deal.

SolNut · « **Reply #24 on:** March 19, 2010, 05:40:42 PM »

Quote from: snaponbob on March 19, 2010, 04:44:19 PM

If so, he got a far better set of gear ratios in THAT deal.

Quote from: snaponbob on March 19, 2010, 04:44:19 PM

If so, he got a far better set of gear ratios in THAT deal.

Not sure what year or NA or RL.

Steve

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Author Topic: downshifting from 5th to 4th (Read 11631 times)