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Diesel Conversions Convert gas to diesel, or convert to a 6.2/6.5/Duramax/Cummins/Navistar/Isuzu/Perkins/Detroit/or ... diesel engine. Go here to see completed projects, works in progress, share your conversion or ask the experts.

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  #31  
Old 01-04-2011, 05:52 PM
BigRabbitMan BigRabbitMan is offline
FMC Cruiser
 
Join Date: May 2007
Location: Dixon, CA
Posts: 83
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Quote:
Originally Posted by BigRabbitMan View Post
Right now the biggest unknown is the transmission issues I have discussed above.
1. Will a Duramax ECM function as well with a non-GM TCM as it does with a GM TCM?

If you can give any help or direct me to a source of information on these two questions, I would greatly appreciate it.
Question #2 was answered elsewhere and the answere was NO.

That leaves Question #1. The reason for this question is that I am considering going with an Allison 2550 due to my driveline parking brake requirement. I would like to have it with the wide grear ratio if I can get it flashed as a 6 spd by Allison. If that can be done, then the question above is very pertinate as it is pointless if the LBZ will only function properly with a GM TCM.

My thoughts are that the LBZ functions with a manual transmission, it should be fine, but I can't find out what inputs other than output shaft speed, if any, are needed by the ECM.

Thaniks,

Thanks,
__________________
Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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  #32  
Old 01-14-2011, 05:17 PM
BigRabbitMan BigRabbitMan is offline
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Join Date: May 2007
Location: Dixon, CA
Posts: 83
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Quote:
Originally Posted by BigRabbitMan View Post
That leaves Question #1. The reason for this question is that I am considering going with an Allison 2550 due to my driveline parking brake requirement. I would like to have it with the wide grear ratio if I can get it flashed as a 6 spd by Allison. If that can be done, then the question above is very pertinate as it is pointless if the LBZ will only function properly with a GM TCM.
After many discussions and consideration of verious factors, the decision has been made to use the Allison from the donor vehicle and its control module. I will not have the wider ratios for the first couple of gears, but I can live with that.

I have confirmed with the Allison technical advisor of Allison West that the GM 1000 can be converted from 4 wheel drive to 2 wheel drive with provisions for the standard driveline brake which is a requirement in my case. He will be researching the part numbers to pass along. The transfer case will be removed and the correct tail housing and tail shaft will be installed. He may also have a buyer for my transfer case!

Pictures of the donor vehicle (2006 Sierra 2500) are here: http://travel.webshots.com/album/579528614eUJYCC

As we move throught this project pictures will be added to that album.

A vacuum pump from a 2002 Lb7 has been secured to provide the vacuum needed for the brakes. I am still in need of a second alternator with bracket and an idler so that I will have a dual alternator setup.

Repair manuals have been purchased and have arrived so that wiring needs can be studied and the best procedure for removeing the harnesses from the donor can be developed.

... to be continued ...
__________________
Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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  #33  
Old 02-28-2011, 10:05 PM
BigRabbitMan BigRabbitMan is offline
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Join Date: May 2007
Location: Dixon, CA
Posts: 83
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An update is in order. Work on the donor GMC Sierra has continued. Since we are working outside, we are subject to weather on Saturdays as well as family matters. The combined effects greatly reduced our work days these last two months.

We have desmantled the front end while tagging anything that we will be hooking back up in motor after the transplant. we are almost ready to extract the LBZ and Allison from the donor. It will then have the output shaft and housing changed from a 4x4 set up to 2 wd with a driveline parking brake.

I have posted a number of pictures at the link in the above post. Go take a look. As we progress I will continue to add pictures.
__________________
Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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  #34  
Old 04-02-2011, 11:16 PM
BigRabbitMan BigRabbitMan is offline
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Join Date: May 2007
Location: Dixon, CA
Posts: 83
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We are doing a "full swap" to the extent possible in this case. You could do a "minimal swap" which would not involve the dash cluster, etc. and with that swap you would retain the original guages/dash. We are doing it as the full swap so that the benefits of the full guage cluster and the Driver Infornation Center (DIC) would be retained. This includes cruise control. The exisiting systems on all non-computer controlled engines will not work as there is no linkage for the cruise control to attach to.

An example of the two levels of conversion are like what we are involved in right now when it comes to the engine fan. The donor fan will not work as it is a puller and not a pusher fan. It also has an ambient air (exiting the radiator) thermal viscous clutch to control fan speed which also will not work as the air is going the opposite direction and will never engage the fan.

The simple solution would be to just remove the clutch and bolt the fan, by using an adapter, to the idler and have the fan operate at engine rpm the same as our fans do on the 440, 8.2, 5.9 etc. The drawback to that simple solution is that the fan is always drawing full horsepower for the given rpm and, therefore, energy and fuel.

In an attempt to improve on that situation and have the fan only operate at the speed needed for conditions, we are currently looking for a fan clutch/controller combination that will electrically control the fan speed via a viscous coupling based on engine coolant temperature. When cruising on flat land in cold weather the fan could operate at significanlty less speed than what is needed on a hot summer day if we find the right combination. Given the amount of air that the fan will be capable of moving, the difference can be significant over a number of miles.

Stay in touch as we work our way through this project. Your questions/sugggestions are always welcome.
__________________
Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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  #35  
Old 04-02-2011, 11:21 PM
BigRabbitMan BigRabbitMan is offline
FMC Cruiser
 
Join Date: May 2007
Location: Dixon, CA
Posts: 83
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We we haven't made much progress lately as we are working outside and it has been raining every weekend here in Northern California. The mountains have 165% of normal snow load! That has given us time to debate another conversion issue/question.

The question is: Should we move the donor steering wheel and upper steering column as well as the dash instruments to the FMC from the GMC Sierra?

Changing the column would add the complications of doing that transfer, but would simplify the wiring as the four radio control switches, two DIC switches, shifting switch, tow/haul switch and cruise control switchs would no longer be needed to be rewired or moved to dashboad switches. The steering wheels themselves are within 1/4 inch diameter of each other. It would also be nice to have all of those controls on the "smart" steering wheel with the factory lighted rocker switches and their symbols.

We were fortunate to have another FMC owner who is an aircraft mechanic stop by on his way south so that we could visit and debate the steering column question. After that discussion, I believe we will be adding that change to the list of changes.

My coach will move to Eric's next weekend. In the following weeks the engine and transmission will come out of both the donor unit and the FMC. At that point, more pictures will be posted and we may have some more issues to solve.

To be continued .........

__________________
Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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  #36  
Old 04-21-2012, 11:41 PM
BigRabbitMan BigRabbitMan is offline
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Join Date: May 2007
Location: Dixon, CA
Posts: 83
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After much delay and sidetracks to do other projects, the conversion project is continuing. All of the rear end stuff has been removed (bumper, exhaust system, radiator, panelling etc. Now removeing some of the engine asessories for easier extraction and disconnecting the things that connect to the engine. Also all of the firewall stuff will be removed as well. A few new photos have been posted in the album linked above.

Due to time constaints, we will not be moving the steering wheel over to the coach. That may happen later. First, we will get the coach back on the road.
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Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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  #37  
Old 04-24-2012, 06:28 AM
DieselDavy DieselDavy is offline
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Join Date: Sep 2001
Location: Ft. Wayne, In.
Posts: 434
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Great story! Keep us updated!
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Dave, N9LOV
Member #242
Dave's Diesels:
Sold June, 07 '82 1/2 ton 4X4;340k miles
'97 2 Dr Tahoe, Intercooled,
Kennedy ECM, 4" Exhaust
'02 GMC
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  #38  
Old 04-29-2012, 09:39 PM
BigRabbitMan BigRabbitMan is offline
FMC Cruiser
 
Join Date: May 2007
Location: Dixon, CA
Posts: 83
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Quote:
Originally Posted by DieselDavy View Post
Great story! Keep us updated!
The 440 is now out! Yeah!!
http://travel.webshots.com/album/579...UJYCC?start=48

That link will take you to the current pictures with commentary. A long tedious process of preparing the coach for the Durmax will now begin.
__________________
Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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  #39  
Old 05-13-2012, 06:57 PM
BigRabbitMan BigRabbitMan is offline
FMC Cruiser
 
Join Date: May 2007
Location: Dixon, CA
Posts: 83
Default

Continuing to progress! Go to pages 6 and 7 of the above linked photo album. It shows what we have to clean up and, finally, the clean firewall. A few more things to do and then the sound suppression material can be applied to the existing firewall and then a new sheet of aluminum to form a new firewall. This will result in a double walled firewall with sound suppression material between the two layers of the firewall.
__________________
Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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  #40  
Old 06-11-2012, 12:11 PM
BigRabbitMan BigRabbitMan is offline
FMC Cruiser
 
Join Date: May 2007
Location: Dixon, CA
Posts: 83
Smile

The TURNING POINT has been achieved! The installation of the first of the new things has started. While more things (throttle cable, wires, center section of dash, etc.) still have to be removed, the lining of the engine compartment has started. It is rewarding to be putting something into the coach instead of taking something out. I have started the installation of the FatMat sound suppression material which will be followed by 1/4" small cell foam board and by 1/8" sheet aluminum. It can be seen at the above link.
__________________
Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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