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#1 |
Back in the sticks
Join Date: Jan 2001
Location: Fordland, MO
Posts: 3,188
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4WD Optest, SAT!
Well, we got butt slammed yesterday by the first El Nina winter storm in Western Washington. Got off of work and into the parking lot that was the commute home and immediately had to try and climb a large hill right off the base. The Blazer was loose and slipping in 2WD, so I shifted her down into 4LO and she crawled up that hill like it wasn't anything. Continued on towards home and alternated between 2Hi and 4Hi and was really pleased with how she did. Made it home no problem, unlike many of my fellow commuters.
Now I just have to get my carb and timing figured out as I ran my last tank of gas mileage. A whopping 6.71 mpg.
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1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty |
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#2 |
Registered User
Join Date: Apr 2010
Location: AK
Posts: 198
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Re: 4WD Optest, SAT!
Ouch, I daily drive mine with 33's and get 12mpg.
As to snow performance yeah these trucks do great. However when they do finally break loose you better be on top of it as they spin fast! On those days I miss my old longbed extended cab truck. It seemed like you had time to drink a coffee before you had to catch a skid in that thing. |
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#3 |
Back in the sticks
Join Date: Jan 2001
Location: Fordland, MO
Posts: 3,188
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Re: 4WD Optest, SAT!
Hehe, guess I spoke too soon, as this morning going to work I hit some ice and found out what you are talking about. I did a nice controlled 360 into the ditch. Was real slow, so no damage and she walked right out of it and I went on my merry way to work. Guess there's no help when it comes to ice and going downhill.
Ya, I need to figure out what is going on with my carb and timing, something is off.
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1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty |
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#4 | |
Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: 4WD Optest, SAT!
Quote:
I average about 8-9 mpg last time i checked, but that was many years ago, i gave up on that after a while. \\EDIT:Oh yea the weather, says its suppost to get down to 12 degrees tonight, i'm just south of you.
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's Last edited by swamp rat; 11-23-2010 at 08:06 PM. |
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#5 | |
Registered User
Join Date: Apr 2010
Location: Everett, WA
Posts: 504
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Re: 4WD Optest, SAT!
Quote:
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#6 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: 4WD Optest, SAT!
Man, I hope you guys keep all of the snow this year!
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Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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#7 | |
Back in the sticks
Join Date: Jan 2001
Location: Fordland, MO
Posts: 3,188
|
Re: 4WD Optest, SAT!
Quote:
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1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty |
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#8 |
Back in the sticks
Join Date: Jan 2001
Location: Fordland, MO
Posts: 3,188
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Re: 4WD Optest, SAT!
We didn't end up with that much snow, but the roads were just packed snow and ice by about 4PM yesterday. Pretty much every road was a parking lot and the hills were blocked by wrecked cars. And hills is about all we have down here.
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1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty |
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#9 |
Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: 4WD Optest, SAT!
Yer talking about a place that is in one of its once every 20 year cold snaps, this is a rare occasion to say the least!
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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#10 |
SKINNY TIRES RULE!
Join Date: Sep 2001
Location: Bothell, WA
Posts: 11,049
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Re: 4WD Optest, SAT!
I've had my truck in 4wd since the commute home on Monday. I'll probably pop it into 2wd for the drive home tonight after I get out of the ice covered parking lot at my office.
Do you have to come to a complete stop to switch between 2hi and 4hi?
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bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L |
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#11 |
Registered User
![]() Join Date: Mar 2010
Location: Cottage Grove, OR
Posts: 63
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Re: 4WD Optest, SAT!
No. I go back and forth all the time while rolling in my Dad's 72 K20. Sometimes it's a little tricky, basically like shifting a std. trans with no clutch.
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1972 Chevy K5 Blazer 1972 Chevy K20 1955 Chevy 3100 "If we knew what it was we were doing, it would not be called research, would it?" - Albert Einstein |
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#12 |
Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: 4WD Optest, SAT!
The truck is definantly not a shift on the fly truck, but a little bit of a roll won't hurt, i am talking a very slow roll. Normally i just stop the truck and put it in nuteral.
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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#13 |
SKINNY TIRES RULE!
Join Date: Sep 2001
Location: Bothell, WA
Posts: 11,049
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Re: 4WD Optest, SAT!
I've always come to a stop & put it in neutral to switch from 2wd to 4wd. I don't think I've ever used 4lo. It sounds like I may get a chance.
By the way - skinny tires rock on the ice and snow. I tried to get it to slip yesterday and couldn't.
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bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L |
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#14 |
Registered User
Join Date: Apr 2010
Location: AK
Posts: 198
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Re: 4WD Optest, SAT!
Guys you are mistaken about shift on the fly ;-) As long as your hubs are locked you can do it at any speed. I do it all the time. I do take my foot off the gas and coast when doing it. To go to 4 low yeah you should stop or be under 5 mph.
I leave my hubs locked all winter and shift the T case as needed. I've lived in Alaska for 33 years and have never had a set of chains (although I can remember twice that I would have liked them). 4 wheel drive and careful/skilled driving are all you need. I have to second the comment on tall skinny's. I run 33x9.5 and they just grab the snow. For reference regarding the "on the fly" here is a shot from my owners manual. ![]() Last edited by AlaskaMatt; 11-24-2010 at 03:09 PM. |
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#15 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: 4WD Optest, SAT!
You must have one of the only 205's I've seen that you can shift on the fly then. Because all of the ones I've owned or ridden in, you had to be pretty much stopped or barely rolling to switch it.
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Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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#16 |
Registered User
Join Date: Apr 2010
Location: AK
Posts: 198
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Re: 4WD Optest, SAT!
Perhaps I got lucky, but mine shifts really easily. I have read elsewhere that the reason many are so finicky has to do with the lever itself (something about greasing the lever where it connects to the T case, I don't remember exactly), as the gears should mesh up without any problem. When I first got the truck it was really difficult to get it to shift into 4. A friend suggested moving it back and forth, with the engine off and sitting still, a bunch of times to free up the linkages. It really seemed to work.
Last edited by AlaskaMatt; 11-24-2010 at 04:04 PM. |
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#17 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: 4WD Optest, SAT!
There should be a grease zerk in the shifter handle retaining bolt, that's where you can grease it. I think a lot of it has to do with how many times the tcase has been forced in and out of ranges over the years. Even new ones I've been around wouldn't shift perfect like a newer transfer case. But then again, the 205's aren't synchronized either. That's the biggest reason you have to be stopped or slow rolling to get the gears to mesh and go in a different range.
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Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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#18 |
SKINNY TIRES RULE!
Join Date: Sep 2001
Location: Bothell, WA
Posts: 11,049
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Re: 4WD Optest, SAT!
I've never tried switching mine while moving. I just assumed it wouldn't work and I don't want to see gear chunks flying through the floorboard.
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bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L |
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#19 |
Registered User
![]() Join Date: Mar 2010
Location: Cottage Grove, OR
Posts: 63
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Re: 4WD Optest, SAT!
Pushing sprint cars in the dirt, I regularly switch from 4hi to 2hi and back at any speed from 0-40 mph several times a night every weekend in the summer. 205s are definitely shift on the fly or I would have broken it by now.
I've been getting 8-10 mpgs with a slipping transmission and a heavy foot, and thought I was doing bad. Less than 7 is no good at all. I'm going to be rebuilding some drivetrain parts (the th350 first, it finally died) this winter, and I'm not at all excited about these temps with no heat in the shop.
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1972 Chevy K5 Blazer 1972 Chevy K20 1955 Chevy 3100 "If we knew what it was we were doing, it would not be called research, would it?" - Albert Einstein Last edited by 2fast55; 11-24-2010 at 07:12 PM. |
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#20 |
Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: 4WD Optest, SAT!
In my last post by shift on the fly i was refering to the 205 not being syncronised.
But hey just another reason i love this forum because i had no idea i could shift on the while moving at "any speed" on loose surfaces, i'll have to give it a try sometime! I thought it was about 5mph max. AklaskaMatt, Thanks for posting that owners manual page!! I wish all the visors of 4WD vehicles had this printed on the drivers visor for quick reference.
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's Last edited by swamp rat; 11-24-2010 at 09:32 PM. |
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#21 |
SKINNY TIRES RULE!
Join Date: Sep 2001
Location: Bothell, WA
Posts: 11,049
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Re: 4WD Optest, SAT!
Is there a difference between manual transmissions and autos with shifting on the fly?
__________________
bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L |
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#22 |
Registered User
Join Date: Apr 2010
Location: AK
Posts: 198
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Re: 4WD Optest, SAT!
To my knowledge it shouldn't matter, but mines an auto for the record.
And Swamprat, just make sure your hubs are locked first.... or well, it might not work out so well!!! |
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#23 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,913
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Re: 4WD Optest, SAT!
Mine's an auto. I lock the hubs when the first snow flies and leave them locked until spring springs. I shift into 4wd at whatever speed I'm at and I've never had a problem. Sometimes getting back into 2wd it sticks a little.
I've got a 350 with an auto and 33X12.5s and I average 10 1/2 mpg. |
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#24 | |
Registered User
![]() Join Date: May 2006
Location: Wyman, Kentucky
Posts: 403
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Re: 4WD Optest, SAT!
Quote:
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1972 GMC Jimmy, 4WD, 454 CI, 350 Turbo, 4" lift, 35" tires The math teacher said my son "Bubba" could be a mathmatical genius. cause he's got 13 fingers! |
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#25 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: 4WD Optest, SAT!
All the ones I have had were 4 speeds, so maybe it takes a little more with the 4 speeds? IDK
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Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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