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F40 swap question by gambler85
Started on: 02-15-2015 06:38 PM
Replies: 8 (486 views)
Last post by: gambler85 on 03-07-2015 08:41 AM
gambler85
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Report this Post02-15-2015 06:38 PM Click Here to See the Profile for gambler85Click Here to Email gambler85Send a Private Message to gambler85Edit/Delete MessageReply w/QuoteDirect Link to This Post
I was reading up on six speed swaps for the fiero and I have a few questions. I was told I could use 2006 cobalt ss (supercharged) axles, and a 2005 9-5 manual jackshaft. Then I would just have to move the engine and trans assembly 2" to the passenger side of the engine compartment.

I was also told that with my 3.4 Dohc I should be able to use a stock 3.4 Dohc flywheel with a spacer from archie.
I found some information stating that spec makes a clutch that will bolt up to a stock 60° flywheel for use with a f40 trans? ( I can't verify this info.)

I also found out that u can modify a stock 4 speed shifter to work for a 6 speed swap, and that Rodney dickman has available a modified shifter cable to also use on the f40 trans.

The only thing that I can't find any info on is the mounts to mount the trans. If anyone can tell me how to make them or give me pics of their's that would be cool.

Just needing to know if I can believe all this info to be true for this swap. It seems that so many people have tried so many ways to do this swap and the info is all over, just trying to gather it all in one spot andake this easier for me or anyone else in the future of doing this. Thanks
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Report this Post02-15-2015 06:58 PM Click Here to See the Profile for FIEROFLYERSend a Private Message to FIEROFLYEREdit/Delete MessageReply w/QuoteDirect Link to This Post
Not sure on the flywheel for the 3.4 but the axle and jack shaft info is correct for the F40. Now the drive train moves about an inch closer to the trunk wall because of the tranny but the movement to the pass side is due to the axles if you play around you should be able to find axles or have ones made so the engine can stay left to right where it normally sits.
I tried messing around with a jack shaft from a Saturn ION that had the F35 but there was not enough room for the axle inner going into the jack shaft to clear the 3800 oil filter adapter but this should not be a problem with the 3.4. I have this jack shaft with an axle installed with it if you can't find a SAAB one.
Mounts wise I make my own and found making them with poly is easier then trying to make brackets that work with the stock Fiero rubber mounts like I do with other trannies.
For the flywheel on the 3800 I use a stock Firebird manual 3800 flywheel the clutch that SPEC sells for this set up with an HTOB spacer 1/4 inch thick. For the 3.4DOHC I am wondering if you could get away with using a stock Firebird 3.4 manual flywheel and the same SPEC clutch and HTOB spacer this might be worth looking into

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DARN Cars now open with
Over 30 years wiring experience between cars and trade as an avionics technician in both Canadian Air Force and civilian aviation.
Over 25 years experience building and modifying cars.
Over 10 years of full Fiero engine swaps and harnesses building and still going.

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gambler85
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Report this Post02-15-2015 07:15 PM Click Here to See the Profile for gambler85Click Here to Email gambler85Send a Private Message to gambler85Edit/Delete MessageReply w/QuoteDirect Link to This Post
Thank u for the info fieroflyer. Did u get my pm I sent u the other day? Also I will look into the firebird flywheel. In a perfect world that flywheel would work but who knows.

Does spec make a clutch for a 3.4 firebird motor with a htob spacer?
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Report this Post02-15-2015 07:26 PM Click Here to See the Profile for FIEROFLYERSend a Private Message to FIEROFLYEREdit/Delete MessageReply w/QuoteDirect Link to This Post
Been trying to get to making a set of F40 mounts to send pics but the weather has been brutal here way too much snow and well tonight it is going down to minus 29 Celsius with out the windchill and today never got above minus 24 to give an idea of what I mean
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gambler85
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Report this Post02-15-2015 07:40 PM Click Here to See the Profile for gambler85Click Here to Email gambler85Send a Private Message to gambler85Edit/Delete MessageReply w/QuoteDirect Link to This Post
Yeah the high today was only -7°. I pmd u the other day about a wiring harness. Was wondering if u had time to get back to me about that. But on a side note I'd be interested in u making me a set of mounts if u could.
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fast40driver
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Report this Post03-07-2015 01:49 AM Click Here to See the Profile for fast40driverClick Here to Email fast40driverSend a Private Message to fast40driverEdit/Delete MessageReply w/QuoteDirect Link to This Post
For clutch/flywheel, I just used stock parts. G6 dual mass flywheel, stock G6 clutch, G6 HTOB, G6 flywheel bolts - just bolted it together.

Mike
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mr_corean
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Report this Post03-07-2015 05:04 AM Click Here to See the Profile for mr_coreanSend a Private Message to mr_coreanEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fast40driver:

For clutch/flywheel, I just used stock parts. G6 dual mass flywheel, stock G6 clutch, G6 HTOB, G6 flywheel bolts - just bolted it together.

Mike


What engine did you bolt that to?
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Joseph Upson
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Report this Post03-07-2015 06:58 AM Click Here to See the Profile for Joseph UpsonClick Here to Email Joseph UpsonSend a Private Message to Joseph UpsonEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fast40driver:

For clutch/flywheel, I just used stock parts. G6 dual mass flywheel, stock G6 clutch, G6 HTOB, G6 flywheel bolts - just bolted it together.

Mike


That will be the easiest approach. If you can find the complete passenger side axle assembly and install the Fiero outboard joint cup on it that will simplify things even further although it will require a shift of the assembly to the left (driver side) 1". The cobalt/Saturn Redline axles are weak due to a taper of the shaft going into the outboard joint and were strengthened for the switch from supercharged to turbocharged models in 08 which changed the outboard joint also making it no longer a direct fit for the Fiero hub.

Of course if you take this approach you'll need to have a custom shortened driver side axle which is still fairly straight forward and inexpensive through Moser racing which can make you a custom set of axles in the appropriate length, or a single axle, or shorten and respline a longer axle for even less ~$100.

Knowing what I know now from having performed this swap when it was still very new, I would send Moser a disassembled 06-07 Cobalt axle as a template (they'll need it to match the spline arrangement) and have them make me a pair of axle shafts in the appropriate length. If you score a G6 jack shaft which should bolt directly to the 3.4 DOHC block, you should be able to get away with only needing to swap the passenger side inboard joint assembly onto your new axle to avoid having to adapt the Saab jack shaft to the block. The reason is that the jackshaft for the G6 is male ended vs. female for the Saab and the joints different in size so the cups can't simply be swapped from one to the other.

If you do go with Moser, be forewarned, make sure they cut the joint retaining ring groove no deeper than what is found on the stock axle. I wasn't thinking when I saw that they cut the groove on my axle deep like that found on rear wheel drive axles and put the retaining ring on anyway only to realize after putting the joint on that it would be impossible to remove it because the retaining ring moved to an eccentric position and acted like a lock against joint removal.

[This message has been edited by Joseph Upson (edited 03-07-2015).]

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gambler85
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Report this Post03-07-2015 08:41 AM Click Here to See the Profile for gambler85Click Here to Email gambler85Send a Private Message to gambler85Edit/Delete MessageReply w/QuoteDirect Link to This Post
hank I everyone for the continued help. I have a wide track suspension for my car so I would have to get custom axles made anyhow but now I know which axles to get and have them lengthen them. My suspension is pushed out 4" per side in the rear.

I have gotten some parts for the swap but still can't find mounts. I guess those are the only thing I need to find to be able to start this swap. Thank u all again
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