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For those that question the strength of a 241 t case

W

wayne

3/4 ton status
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If you think a 241 is not strong then this might help change your thoughts. This rig is for sale (not mine) and is pretty much a GM under a different skin. This is from the for sale add so yolu can see what it has.

All 1.75 D O M tube 2x3 subframe howell TBI inj 350 /whyd roller cam TH400 rev man valve body.np241T/C. 110 in" w/b F O A 2.5x14 coilovers . dana 60hp front 5:38 detroit 14bolt rear 5:38 . 42" TSL artcarr shifter corbeau seats cyberdyne guages painles key/switch panel.

http://www.youtube.com/watch?v=bkQ4nWkKZYw
 
241 are a great Xfer case. The best aluminum case ever put on Chevy trucks.
Some people like them better than 205 because of their strength and light weight.
 
This guy shows 'em how it's done. :waytogo:
[youtube]JjMYHfJY9s8&NR=1[/youtube]
NP241's are great.
 
241s are the same as a 208 minus that the 241 has an electrical speedometer output right? or am i wrong there?
 
241 has a stronger case than 208, 241 has Better lubrication, 241 has lower gear ratio, 208=2.61
241= 2.72
241 came with both mechanical and electric spedo connections
 
208 has 2.61:1 low range,
241 has 2.72:1 low range
208 does not use an oil pump
241 uses an oil pump
Chain is wider on a 241 than a 208
1989 241 is the only year for mechanical speedo
 
So, on the outside they are all the same? excluding the electric speedo part? As it they will bolt right in place of eachother?


Guy had a 241t case and 3.73 axles locally, i think the 88-91 axles were supposed to be 30 spline as opposed to 28 spline, and right now my 86 has 3.08s. But, by being a 90 it would more than likely have the Electronic speedo, so id still be sol on the tcase. Thanks for schoolin me a ltitle bit, im still new to the 4x4 world. And being a 19 year old kid, still got alot to learn.

Edit: ya he did say it had electric speedo, oh well.
 
I guess 241s are pretty internally stout even though they're a chain case. I broke 2 of them from a snapped front driveshaft and smacking the case on a rock. Since then, I have been verbally bashing the 241 cases, strongly favoring the 205s over them. So as long as I'm more careful, 241s should last forever. I opted for a round 205 to bolt behind my 465 but due to their limited availbility, I've decided to stick with the 241 from my Blazer.

OMG, I can't believe I just said that. Who am I and what have y'all done to me? :p:
 
BadAss90K5 said:
:confused: All this time, I thought the 208 is a gear case. Good to know though.
Click to expand...


I used to think the same thing, then 6 months ago when i wanted to swap the 700r4 in favor of a th350, a guy on my other forum (67-72 chevy trucks) told me that a 208 was a chain drive, not a gear drive. I was shocked becasue i always thought the 208 was a lighter version of the 205 since it was part time case. Nope, i was wrong, lol.
 
If you are doing rocks and rough stuff your best bet it to clock your 241. That rotates the bottom of the case it up and out of harms way.
 
Thunder said:
If you are doing rocks and rough stuff your best bet it to clock your 241. That rotates the bottom of the case it up and out of harms way.
Click to expand...

Like this.:D

K5%20stuff%20059.jpg
 
I have no opinion on the 241 either way, but I'm not sure this was such an impressive test of a transfer case.

What I see is a TBI SBC (not a real powerful motor) spinning tires on a very light vehicle. The TH400 also absorbs and cushions the power fed to the 241 in ways dumping a clutch does not. The stress I see is the lockers and the 42's, but that's partially mitigated by the 5.38 ratios.

I would be more impressed by a big block Suburban rolling on 42s loaded down with 50 sheets of drywall trying to get up that hill. Not that something like that would happen, but you get the point.

BTW, this guy seems a little rough on tires. If you noticed, he didn't make a lot of progress when the tires were spinning and he rocked side to side hunting for traction. Yes, hot tires will give you a little better grip, but he made progress when he backed up a little and used momentum and finesse to bump up and over the ledges. Pinning the pedal on the right and spinning the tires for 10 to 20 seconds at a time on rock might win points with the spectators, but it usually isn't the ticket to the top of the hill.

Perhaps this was a competition and he was trying to avoid deductions for popping it in reverse, or stopping. Tire spin has its place in mud to clean the tread, but on rock, a spinning tire is a tire that is providing less traction than is available.

While I'm not sure this was a good test of a t-case, it was entertaining!

Edit: Maybe that motor isn't as gutless as I assumed. I re-read the specs and it's a Howell TBI, not factory. He could have decent heads and a cam and used the Howell to tune it.
 
ngoluba said:
I have no opinion on the 241 either way, but I'm not sure this was such an impressive test of a transfer case.

What I see is a TBI SBC (not a real powerful motor) spinning tires on a very light vehicle. The TH400 also absorbs and cushions the power fed to the 241 in ways dumping a clutch does not. The stress I see is the lockers and the 42's, but that's partially mitigated by the 5.38 ratios.

I would be more impressed by a big block Suburban rolling on 42s loaded down with 50 sheets of drywall trying to get up that hill. Not that something like that would happen, but you get the point.

BTW, this guy seems a little rough on tires. If you noticed, he didn't make a lot of progress when the tires were spinning and he rocked side to side hunting for traction. Yes, hot tires will give you a little better grip, but he made progress when he backed up a little and used momentum and finesse to bump up and over the ledges. Pinning the pedal on the right and spinning the tires for 10 to 20 seconds at a time on rock might win points with the spectators, but it usually isn't the ticket to the top of the hill.

Perhaps this was a competition and he was trying to avoid deductions for popping it in reverse, or stopping. Tire spin has it's place in mud to clean the tread, but on rock, a spinning tire is a tire that is providing less traction than is available.

While I'm not sure this was a good test of a t-case, it was entertaining!
Click to expand...


all of the vids from that group you wil see the same scenario, lots of wheel spin, side to side and slow progress. Cable hill is a good example with lots of vids.

As for the 241, I believe in their beef under a full size rig. Atlas even uses the planetaries in the atlas 4 speed t-case. Weight wise a 205 and 241 are the same. With an auto I would run one clocked, with a manual I would run a 205.
 
4xcrazy said:
yeah, that's pretty much all i saw was a serious abuse of tires and of course the trail... :rolleyes:
Click to expand...


That is what their terrain offers, slick, wet, loose hill climbs and trails lined with trees. Most of the east cost wheeling is already choked down to private parks and land already soooo

Its not the same as we have it.
 
4X4HIGH said:
208 has 2.61:1 low range,
241 has 2.72:1 low range
208 does not use an oil pump
241 uses an oil pump
Chain is wider on a 241 than a 208
1989 241 is the only year for mechanical speedo
Click to expand...

241 has a six pinion planetary gear which can handle more torque than the 208's four pinion one.
 
ngoluba said:
I have no opinion on the 241 either way, but I'm not sure this was such an impressive test of a transfer case.

What I see is a TBI SBC (not a real powerful motor) spinning tires on a very light vehicle. The TH400 also absorbs and cushions the power fed to the 241 in ways dumping a clutch does not. The stress I see is the lockers and the 42's, but that's partially mitigated by the 5.38 ratios.

I would be more impressed by a big block Suburban rolling on 42s loaded down with 50 sheets of drywall trying to get up that hill. Not that something like that would happen, but you get the point.

BTW, this guy seems a little rough on tires. If you noticed, he didn't make a lot of progress when the tires were spinning and he rocked side to side hunting for traction. Yes, hot tires will give you a little better grip, but he made progress when he backed up a little and used momentum and finesse to bump up and over the ledges. Pinning the pedal on the right and spinning the tires for 10 to 20 seconds at a time on rock might win points with the spectators, but it usually isn't the ticket to the top of the hill.

Perhaps this was a competition and he was trying to avoid deductions for popping it in reverse, or stopping. Tire spin has its place in mud to clean the tread, but on rock, a spinning tire is a tire that is providing less traction than is available.

While I'm not sure this was a good test of a t-case, it was entertaining!

Edit: Maybe that motor isn't as gutless as I assumed. I re-read the specs and it's a Howell TBI, not factory. He could have decent heads and a cam and used the Howell to tune it.
Click to expand...

That engine is not stock. He was also on the spray in that video. :D
 
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