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Old 08-30-2019, 02:15 PM   #1
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Arrow Airstream 345 vs 370

Hi Folks,

Newb here seeking a thorough understanding of the differences between a 345 vs 370. Searched the interwebs and have only managed to confirm that the 370 sat higher (5-7") and that the layout internally is different. Engine was 454 vs 460 and presumably the towing capacity was 1,500 lbs higher with 370.

Any feedback would be greatly appreciated!
Potential purchase interest...

Ross
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Old 08-30-2019, 02:44 PM   #2
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Originally Posted by Masterz View Post
Hi Folks,

Newb here seeking a thorough understanding of the differences between a 345 vs 370. Searched the interwebs and have only managed to confirm that the 370 sat higher (5-7") and that the layout internally is different. Engine was 454 vs 460 and presumably the towing capacity was 1,500 lbs higher with 370.

Any feedback would be greatly appreciated!
Potential purchase interest...

Ross
I will leave the details to the experts but everything up to a 350 sat on a chassis designed for a bread delivery van, whereas the 370 sat on a proper coach chassis.....
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Old 08-30-2019, 03:32 PM   #3
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1936 20' Clipper
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1989 37' Airstream 370
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..... Calling Bob Miller.
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Old 08-30-2019, 08:29 PM   #4
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..... Calling Bob Miller.
Thanks, Gents... Bob?
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Old 08-31-2019, 05:43 AM   #5
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Thanks, Gents... Bob?


I think he is camping in his 370 this weekend.....also known as improvements whilst he camps.
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Old 08-31-2019, 06:10 AM   #6
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350- chevy p30 step van (same as all the other airstream pullers, and a billion other motorhomes)
360- diesel pusher, spartan workhorse I believe?
370- gillig bus chassis, and there were only 33 made
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Old 08-31-2019, 04:06 PM   #7
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Being that both Charly (Streamquest) and I own both 325s and 370s, I think we can both comment on the pluses and minuses of each. All of the classic motor homes with the exception of the 360 and 370 ride on a P-30 or a P-32 chassis if tag axle equipped. The 370 of which 33 were manufactured ride on a Gillig bus chassis. The 370 rides 10 higher than the others. They ride on a full air suspension. All the motor homes ride very well if properly maintained. Being that all that were manufactured from start to 1992 when the national speed limit was 55, they were all geared for 55 MPH. The 370LE was the longest of all, the most spacious rear bedroom of all. I dont think that one model is any better the other, it really comes down to what you like. I have made a couple of small improvements to mine to fit my needs and desires trying to keep the originality in mind, for sure I will not be the last owner. I am happy with the performance of both, but the one I enjoy the most is the 370LE. Regards, Bob......Charly, your turn.....
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Old 08-31-2019, 05:19 PM   #8
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Had an opportunity to purchase a 37' A/S MH but passed it up. I have owned 13 A/S TT. I helped the owner sell his 37' and as a gift he gave me an original one of two decanters that came with the MH when purchased new. It has the letter A etched into it. Very well done. I still have it today and find the liquor inside brings me far more pleasure that did 2 Class A A/S MHs. I found Foretravel - WOW, what a BIG step up in pleasure!
Dr. LRD
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Old 08-31-2019, 05:29 PM   #9
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Try and take a 370 up the Iron Mountain Rd to Mt Rushmore in a 370.....I dare ya. I took my 310 up all the way baby, through all 8 switchbacks and four tunnels.

310's RULE! Until we have to turn; then we're not so good.

Cheers
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Old 08-31-2019, 05:45 PM   #10
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I will send you pictures next year during the trip to Yellowstone and Banff, God willing......Iron Mountain Road....Eh ???....Got proof of that Sidekick, or was that just a dream ??? FYI....had the 370LE at 92 MPH on I88 last Saturday and have the proof ! Once was enough for me....smooth as glass 4600 RPM....Were pulling the engine anyway after Columbus Day weekend, just wanted to see what it could do. See you at the Get-Together ! Regards, Bob
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Old 08-31-2019, 06:09 PM   #11
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Too tell you the truth, my wife was so scared I don't think she took picks, but I think I got her to snap one coming through the first tunnel...which the sign stated was 10'9" clearance....to which I looked at my top cap to see 10'8", but wondered how much taller my Coleman Mach 3's were to the OEM low profile A/C's. We couldn't turn around, so prayed the low parts were to the outside!
Lots of people took pictures of us at the senic overlook at the top before the descent.
Actually 14 switchbacks, 300+ curves and a few pigtails thrown in for good measure.
Trust me, we went up the Iron Mountain Rd; but we wouldn't have if I was reading the map!
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Old 08-31-2019, 11:19 PM   #12
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Pretty good summary Bob.

The most significant differences between the 370 and the others are generally all in the chassis and drive train.
In addition to the ride height, both front and rear wheel tracks are considerably wider, the fronts I would guess by as much as eight to ten inches, which in my mind makes for a more stable platform.
As part of the air ride chassis, the entire front end is a completely different set up. The solid front axle is mounted on two longitudinal leaf springs that pivot at forward mounting points on the frame.
Additionally, the frame itself, running gear, brakes, and everything underneath is just bigger and heavier.
When changing a wheel it's critical to know that the left side lug nuts are left hand threaded!!! Some newer wheel studs on mine are likely testament to a hard lesson learned by a previous owner. (Bet there was some serious cussing that day).
Bob didn't mention it, but the these particular 460 Ford motors were apparently designed to be used in vehicles above 18000 pounds, so it's a pretty solid power plant.

In light of everything he has to say about his 370, Bob's actually hell bent on converting it into the Millennium Falcon. 92MPH might seem ok for now with the new four speed transmission, but the proposed two speed rear differential, and engine freshening, will probably get him into triple digits approaching light speed!

Charly
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Old 09-01-2019, 08:09 AM   #13
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Have a look through the document archive on Airstream.com. This one is from 1989.

https://www.airstream.com/owners/doc.../tc/year/1989/
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Old 09-02-2019, 01:52 PM   #14
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Thanks, all- very helpful. I've since searched through the A/S archives and though there seem to be some gaps in literature, it's made the model differences a little more clear.

I've yet to find any solid towing capacity numbers (though I've read threads claiming 2k for all <370s) or 454/460 engine performance numbers?
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Old 09-02-2019, 02:07 PM   #15
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Originally Posted by bobmiller1 View Post
Being that both Charly (Streamquest) and I own both 325’s and 370’s, I think we can both comment on the pluses and minuses of each. All of the classic motor homes with the exception of the 360 and 370 ride on a P-30 or a P-32 chassis if tag axle equipped. The 370 of which 33 were manufactured ride on a Gillig bus chassis. The 370 rides 10” higher than the others. They ride on a full air suspension. All the motor homes ride very well if properly maintained. Being that all that were manufactured from start to 1992 when the national speed limit was 55, they were all geared for 55 MPH. The 370LE was the longest of all, the most spacious rear bedroom of all. I don’t think that one model is any better the other, it really comes down to what you like. I have made a couple of small improvements to mine to fit my needs and desires trying to keep the originality in mind, for sure I will not be the last owner. I am happy with the performance of both, but the one I enjoy the most is the 370LE. Regards, Bob......Charly, your turn.....

Thanks, Bob.

I've just finished reading through the majority of your 70 page thread, and as amazed at the quality of your refurbishment as I am- wondering if it might be more machine than my wallet and I are up for maintaining?

Maybe the same applies to the other classic variants?

Seems that these beasts are most suitable for well skilled, funded and industry connected mechanical artisans...preferably retired ones. I'm none of these things, and if my objective is to find a reasonably reliable and undemanding way to travel comfortably with a family of 5x- am I better off with a 34' A/S TT? (know you own both)
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Old 09-02-2019, 09:20 PM   #16
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1989 37' Airstream 370
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I managed to find a pic of the front end of my 370. Once the rig was jacked up, it was surprisingly easy to remove as a whole assembly. The front of the vehicle is to the left side of the pic. You can see the bushings where it mounts to the frame and pivots. The air bags mount on the two round plates above the axle.

Charly
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Old 09-02-2019, 10:56 PM   #17
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Thanks for the picture....you made that front end removal look to easy !
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