Lorie Leeson
Analyst · Merrill Lynch
Thank you, Bill. Good morning, everyone. As Bill mentioned, we started fiscal 2018 with strong results, a testament to our ability to execute on our strategy of enhancing our core North American business while simultaneously expanding our international presence.
Revenue of $559.5 million was driven by new railcar deliveries and higher volumes in our Wheels & Parts and Leasing & Services business units. Healthy aggregate gross margin for the quarter of 16% and gains on sale of $19.2 million generated adjusted EBITDA of $76.9 million and earnings of $26.3 million or $0.83 per diluted share. Our deliveries, revenue and earnings set are up nicely to achieve our 2018 guidance.
Orders in the quarter were strong at 3,200 railcar units valued over $209 million. These orders were diverse and comprised a broad range of railcar types, including covered hoppers, tank cars, automotive carrying units and our first order for open-top hoppers. Our order strength demonstrates the benefits of diversifying our product mix and business geographically with international expansion.
We continue to believe backlog is a key indicator of future earnings and cash flow generation. At November 30, the backlog was 26,500 units with an estimated value of $2.56 billion. Based on current production rates, our backlog visibility through 2018 and into 2019. This visibility, combined with our strong balance sheet, gives us the flexibility we need to build railcars when and where our customers need them.
Selling and administrative expense for the quarter included $3.4 million of expense related to resolution of litigation in a foreign jurisdiction. This equates to $2.3 million net of tax or $0.07 per share. Additionally, the tax rate for the quarter was 33.3% versus the prior annual guidance of 29%, the impact of which was $0.07 per share. The higher-than-anticipated tax rate was primarily attributable to discrete items and the geographic mix of earnings. We expect the new tax act, particularly in the long term, to be beneficial. We're evaluating the effect of the onetime tax on unrepatriated foreign earnings and the revaluation of deferred tax assets and liabilities. Further, with our fiscal year, we'll have a blended lower rate in fiscal 2018, which will drop further in our fiscal 2019.
Turning our focus to our business segments. Quarterly gross margin in our manufacturing business was 15.6%, down modestly from the fourth quarter, reflecting product mix shift and timing of syndication activity. Our manufacturing business continues to perform very well. Wheels & Parts quarterly margin was 7.1% compared to 7% last quarter, with the increase primarily a result of higher wheel set and component volumes due to an increase in demand and an increase in scrap metal pricing.
Leasing & Services' gross margin increased to 43.9% in Q1, a sequential improvement compared to Q4. This increase reflects higher interim rent on railcars held for syndication. Below the gross margin line, we had $19 million in gains on sale of leased equipment. As mentioned on our last earnings call, we're in the midst of rebalancing our leased fleet portfolio. We continue to be in a strong financial position, and our balance sheet provides us with significant optionality and flexibility. We ended the first quarter with nearly $1 billion from cash balances and available borrowings on our revolving credit facility. As of November 30, our cash balance was over $590 million.
Our capital allocation strategy is balanced and disciplined, focusing on cash flow generation, return on capital employed and creating long-term shareholder value. This approach enables us to invest through the cycles, both organically and through bolt-on acquisitions, to profitably grow our business while at the same time enhancing shareholder returns. The benefits to shareholders of this approach are evidenced by 15 consecutive quarterly dividends or the cumulative $2.88 per share.
Now based on current business trends, production schedules and excluding the expected benefits of the recent tax reform act, we're confirming guidance for the full fiscal 2018 to be deliveries of 20,000 to 22,000, which includes Greenbrier-Maxion in Brazil, which account for about 10% of deliveries; revenues to be $2.4 billion to $2.6 billion; and diluted earnings per share of $4. Further, we expect G&A to range between $180 million to $185 million, including the previously mentioned legal resolution as well as a full year of larger European operation. Gains on sale will range between $30 million and $35 million as a result of our fleet rebalancing. Our growth capital expenditures are estimated at about $190 million, with $150 million of proceeds from the sale of leased assets, again, higher volume as we rebalance our leased fleet. Depreciation and amortization is expected to be $75 million. Earnings from unconsolidated affiliates reflect our share results from operations that are not consolidated. So that's primarily GBW and our Brazilian operations. As Bill mentioned, we're actively engaged to improve GBW's performance in 2018.
We expect fiscal 2018 earnings attributable to noncontrolling interest to be $25 million to $35 million. As a reminder, our financial statements consolidate the results of 2 significant operations, GIMSA and Greenbrier-Astra Rail, that are not fully owned. So the noncontrolling interest represents our partner share as a result of these operations. There will be quarterly fluctuations in these numbers resulting from the timing of syndication activities at our GIMSA facilities.
For now, we're leaving our expected 2018 annual tax rate of 29% while we evaluate the new tax reform bill. As mentioned last quarter, the pace of deliveries and earnings is expected to be modestly weighted to the second half of the year based on current production schedules, but as you heard today, we're on track to achieve our 2018 guidance.
And now, we'll open it up for questions.