Transmission swap issue

Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)
Post Reply
User avatar
OnlyAnSE
SLE Member
SLE Member
Posts: 69
Joined: Fri Dec 16, 2011 2:17 pm
Year and Trim: 2001 Bonneville SE
Location: Bozeman, MT

Transmission swap issue

Post by OnlyAnSE »

So after I pulled out my stock tranny from my like bottoming out experience we found it had torqued and crack in two places. After getting the new tranny cleaned and painted and making sure all gears were working, we got her reconnected and bolted properly in and on the frame. All wires and bolts got reconnected. Brakes got bled and are working great and all new fluids in everything. She started right up after having to recharge the battery since it was completely dead. She turned over like a Princess and then going for a little test drive BAM..... First gear will not engage. It is starting out in second grear only and and will sit only at about 2000 rpms for a few seconds when floored and then it finally starts raising the tac. Any help is much needed asap Thanks guys.
Gear ratios are 2.86 final on the new one
Morgan
04 gxp bone stock internals. Touchscreen dash with heavily upgraded sounds system.
User avatar
MattStrike
Certified Bonneville Nut
Certified Bonneville Nut
Posts: 4760
Joined: Tue Aug 25, 2009 8:32 pm
Year and Trim: '99 Montana
'04 Dirtymax
'97 Camaro
'92 Trofeo
Location: SE Michigan

Re: Transmission swap issue

Post by MattStrike »

What did the donor trans come from? (year/model) To me it sounds like the trans wire harness is not connected or something like that.
Boost addict
Image

The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67
User avatar
OnlyAnSE
SLE Member
SLE Member
Posts: 69
Joined: Fri Dec 16, 2011 2:17 pm
Year and Trim: 2001 Bonneville SE
Location: Bozeman, MT

Re: Transmission swap issue

Post by OnlyAnSE »

Came out of an 01 bonnie with an FQ3 option thats the only thing I got. I also got a vin number but thats it. It feels like amd electrical problem to me but I'm not sure any thoughts my friend?
Morgan
04 gxp bone stock internals. Touchscreen dash with heavily upgraded sounds system.
User avatar
BoiseGTP
SSE Member
SSE Member
Posts: 108
Joined: Thu May 22, 2008 12:14 am
Year and Trim: 99 Regal, 00 WS6, Gary Fisher 29er

Re: Transmission swap issue

Post by BoiseGTP »

Will it go into 4th? If not its is the 1-2/3-4 solenoid. Bad AFL valve will cause this too, but they usually will work when warmed up but not always. Those are the most common problems I know. GL
Image
http://boiseclubgp.com/
99 Regal Fast - almost running again
98 GTP Sold
02 SSEi Sold
User avatar
Larz01
SSEi Member
SSEi Member
Posts: 195
Joined: Mon Jun 15, 2009 12:04 am
Year and Trim: 2K1 GTP
Location: St. Cloud, MN

Re: Transmission swap issue

Post by Larz01 »

2.86 ratio will have jsfm converter, 3.05 ratio will have a jzfm converter. Did you verify the ratio, before swapping? Check throttle postion connection as well.
Just Your Average open loop tuned Ethanol Driven DD's
Image
2k1 GTP: 13.307 @ 104: Headers, 1.9's, Tune
2k12 Impala: Stock
User avatar
OnlyAnSE
SLE Member
SLE Member
Posts: 69
Joined: Fri Dec 16, 2011 2:17 pm
Year and Trim: 2001 Bonneville SE
Location: Bozeman, MT

Re: Transmission swap issue

Post by OnlyAnSE »

Im positive its the 2.86 ratio and I messed with the throttle and its working just fine. Im leaning towards the solenoids because it won't shift into 1st or 4th.
Morgan
04 gxp bone stock internals. Touchscreen dash with heavily upgraded sounds system.
User avatar
MattStrike
Certified Bonneville Nut
Certified Bonneville Nut
Posts: 4760
Joined: Tue Aug 25, 2009 8:32 pm
Year and Trim: '99 Montana
'04 Dirtymax
'97 Camaro
'92 Trofeo
Location: SE Michigan

Re: Transmission swap issue

Post by MattStrike »

Sounds just like what our van did when the trans harness wasn't connected to the trans. It was pushed on, but not all the way.
Boost addict
Image

The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67
User avatar
OnlyAnSE
SLE Member
SLE Member
Posts: 69
Joined: Fri Dec 16, 2011 2:17 pm
Year and Trim: 2001 Bonneville SE
Location: Bozeman, MT

Re: Transmission swap issue

Post by OnlyAnSE »

Hmmm. Well heres some more info the check engine light and the airbag light are on constantly.
Morgan
04 gxp bone stock internals. Touchscreen dash with heavily upgraded sounds system.
User avatar
BoiseGTP
SSE Member
SSE Member
Posts: 108
Joined: Thu May 22, 2008 12:14 am
Year and Trim: 99 Regal, 00 WS6, Gary Fisher 29er

Re: Transmission swap issue

Post by BoiseGTP »

MattStrike wrote:Sounds just like what our van did when the trans harness wasn't connected to the trans. It was pushed on, but not all the way.
I would check that harness closely and clean all three connections. Beats the crap out of dropping the cradle and changing solenoids.
Image
http://boiseclubgp.com/
99 Regal Fast - almost running again
98 GTP Sold
02 SSEi Sold
Post Reply