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Old 06-15-2024, 06:00 PM
71 lemans sport 455 71 lemans sport 455 is offline
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Default 70 GTO axles

Looking for axles for my 70 GTO. Thanks Chris

  #2  
Old 06-18-2024, 08:29 AM
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ROCKETMAN269V ROCKETMAN269V is offline
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What rear end do you have in it?

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Old 06-18-2024, 11:16 AM
71 lemans sport 455 71 lemans sport 455 is offline
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Its a 70 XK 3:90 rear 10 bolt

I have a 69 XK 3:90 10 bolt rear which i was taking the axles out of the 69 and putting them in the 70 housing but the axles and bearings are different between 69 and 70 which i never knew until now.

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Old 06-18-2024, 11:17 AM
71 lemans sport 455 71 lemans sport 455 is offline
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Its a 70 XK 3:90 rear 10 bolt

I have a 69 XK 3:90 10 bolt rear which i was taking the axles out of the 69 and putting them in the 70 housing but the axles and bearings are different between 69 and 70 which i never knew until now.

  #5  
Old 06-18-2024, 11:19 AM
'ol Pinion head 'ol Pinion head is offline
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Need to supply the casting number on the lower webbing of the housing. Is it a 3.90 or 4.33 HD STT rear?

For '70 model Pontiac A-body's & GP 10 bolts, the original housing has different housing end & uses a tapered bearing axle & an external seal, a 712146, outboard of the tapered axle bearing. '69 & earlier A-body's w bolt in axles used a sealed axle bearing, the RW507C & internal axle seal that seats up in the axle tube inboard of the axle bearing. The early sealed axle bearings eventually seize & begin to chew up the axle. With the HD STT 8.2's having there own HD axles, the typical solution is buy a new pair of axles from Moser. If standard duty tapered bearing axles, nice used are out there, I should have several pair.

One thing I like to note, the '70 & later tapered axle bearings, next to never exhibit wear issues. Most get replaced from a tire/wheel getting curbed hard & the axle being bent. For many years in 8.5 A-body rear builds, I replaced the A9 or A10 axle bearings just out of practice/ "all new bearings, races, seals." The last half dozen 8.5 A-body builds I've taken nice used A9 axle bearings that I'd pressed off & along w a new National 712146 seal, carefully replaced both, typically using a new lock collar sourced from a cheap new RW507 bearing box. After robbing the new collar from the box, I throw away the cheap Chinese axle bearing.

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Old 06-18-2024, 11:26 AM
'ol Pinion head 'ol Pinion head is offline
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Whoa, got treed.
Moser can help you. You will need to download their form & take all the dimensions

If the GTO is a total putt a around deal, the import Yukon replacement axles are cheaoer & are an "either or" type deal, for sealed axle bearing or tapered axle bearing. I personally don't likethat Yukon axle & will not be installing any more.

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  #7  
Old 06-18-2024, 12:18 PM
71 lemans sport 455 71 lemans sport 455 is offline
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Housing number is 9799202

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